315230045638 has 4 divisors (see below), whose sum is σ = 472845068460. Its totient is φ = 157615022818.

The previous prime is 315230045623. The next prime is 315230045639. The reversal of 315230045638 is 836540032513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836540032513 = 863 ⋅969339551.

It is a self number, because there is not a number n which added to its sum of digits gives 315230045638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315230045639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78807511408 + ... + 78807511411.

It is an arithmetic number, because the mean of its divisors is an integer number (118211267115).

Almost surely, 2^315230045638 is an apocalyptic number.

315230045638 is a deficient number, since it is larger than the sum of its proper divisors (157615022822).

315230045638 is a wasteful number, since it uses less digits than its factorization.

315230045638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157615022821.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 315230045638 in words is "three hundred fifteen billion, two hundred thirty million, forty-five thousand, six hundred thirty-eight".