31312061 has 4 divisors (see below), whose sum is σ = 34158624. Its totient is φ = 28465500.

The previous prime is 31312051. The next prime is 31312081. The reversal of 31312061 is 16021313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31312061 - 2⁶ = 31311997 is a prime.

It is a super-3 number, since 3×31312061³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1423265 + ... + 1423286.

It is an arithmetic number, because the mean of its divisors is an integer number (8539656).

Almost surely, 2^31312061 is an apocalyptic number.

It is an amenable number.

31312061 is a deficient number, since it is larger than the sum of its proper divisors (2846563).

31312061 is a wasteful number, since it uses less digits than its factorization.

31312061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846562.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 31312061 is about 5595.7180951152. The cubic root of 31312061 is about 315.1886364883.

Adding to 31312061 its reverse (16021313), we get a palindrome (47333374).

The spelling of 31312061 in words is "thirty-one million, three hundred twelve thousand, sixty-one".