315291178397 has 4 divisors (see below), whose sum is σ = 339544345980. Its totient is φ = 291038010816.

The previous prime is 315291178387. The next prime is 315291178529. The reversal of 315291178397 is 793871192513.

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

It can be written as a sum of positive squares in 2 ways, for example, as 176832024196 + 138459154201 = 420514^2 + 372101^2 .

It is a cyclic number.

It is not a de Polignac number, because 315291178397 - 2⁶ = 315291178333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315291178327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12126583772 + ... + 12126583797.

It is an arithmetic number, because the mean of its divisors is an integer number (84886086495).

Almost surely, 2^315291178397 is an apocalyptic number.

It is an amenable number.

315291178397 is a deficient number, since it is larger than the sum of its proper divisors (24253167583).

315291178397 is a wasteful number, since it uses less digits than its factorization.

315291178397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24253167582.

The product of its digits is 2857680, while the sum is 56.

The spelling of 315291178397 in words is "three hundred fifteen billion, two hundred ninety-one million, one hundred seventy-eight thousand, three hundred ninety-seven".