312155232439 has 2 divisors, whose sum is σ = 312155232440. Its totient is φ = 312155232438.

The previous prime is 312155232427. The next prime is 312155232469. The reversal of 312155232439 is 934232551213.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312155232439 - 2¹³ = 312155224247 is a prime.

It is a super-2 number, since 2×312155232439² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312155232469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156077616219 + 156077616220.

It is an arithmetic number, because the mean of its divisors is an integer number (156077616220).

Almost surely, 2^312155232439 is an apocalyptic number.

312155232439 is a deficient number, since it is larger than the sum of its proper divisors (1).

312155232439 is an equidigital number, since it uses as much as digits as its factorization.

312155232439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 40.

The spelling of 312155232439 in words is "three hundred twelve billion, one hundred fifty-five million, two hundred thirty-two thousand, four hundred thirty-nine".