312225061 has 4 divisors (see below), whose sum is σ = 312330124. Its totient is φ = 312120000.

The previous prime is 312225041. The next prime is 312225073. The reversal of 312225061 is 160522213.

312225061 = 12494² + 12495².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160522213 = 53 ⋅3028721.

It can be written as a sum of positive squares in 2 ways, for example, as 156125025 + 156100036 = 12495^2 + 12494^2 .

It is a 4-Lehmer number, since φ(312225061) divides (312225061-1)⁴.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312225061 is a prime.

It is a deceptive number, since it divides R_312225060.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312225041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47940 + ... + 54061.

It is an arithmetic number, because the mean of its divisors is an integer number (78082531).

Almost surely, 2^312225061 is an apocalyptic number.

312225061 is the 12495-th centered square number.

It is an amenable number.

312225061 is a deficient number, since it is larger than the sum of its proper divisors (105063).

312225061 is a wasteful number, since it uses less digits than its factorization.

312225061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105062.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 312225061 is about 17669.8913692190. The cubic root of 312225061 is about 678.4053326186.

Adding to 312225061 its reverse (160522213), we get a palindrome (472747274).

The spelling of 312225061 in words is "three hundred twelve million, two hundred twenty-five thousand, sixty-one".