312549131 has 4 divisors (see below), whose sum is σ = 330934392. Its totient is φ = 294163872.

The previous prime is 312549121. The next prime is 312549151. The reversal of 312549131 is 131945213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312549131 - 2¹⁸ = 312286987 is a prime.

It is a super-2 number, since 2×312549131² = 195373918577710322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312549094 and 312549103.

It is not an unprimeable number, because it can be changed into a prime (312549121) 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, 9192605 + ... + 9192638.

It is an arithmetic number, because the mean of its divisors is an integer number (82733598).

Almost surely, 2^312549131 is an apocalyptic number.

312549131 is a deficient number, since it is larger than the sum of its proper divisors (18385261).

312549131 is a wasteful number, since it uses less digits than its factorization.

312549131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18385260.

The product of its digits is 3240, while the sum is 29.

The square root of 312549131 is about 17679.0591095793. The cubic root of 312549131 is about 678.6399654990.

The spelling of 312549131 in words is "three hundred twelve million, five hundred forty-nine thousand, one hundred thirty-one".