315842438021 has 16 divisors (see below), whose sum is σ = 346376933376. Its totient is φ = 285614910000.

The previous prime is 315842437973. The next prime is 315842438027. The reversal of 315842438021 is 120834248513.

It is a cyclic number.

It is not a de Polignac number, because 315842438021 - 2⁶ = 315842437957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315842438021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315842438027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1797056 + ... + 1964966.

It is an arithmetic number, because the mean of its divisors is an integer number (21648558336).

Almost surely, 2^315842438021 is an apocalyptic number.

It is an amenable number.

315842438021 is a deficient number, since it is larger than the sum of its proper divisors (30534495355).

315842438021 is a wasteful number, since it uses less digits than its factorization.

315842438021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168824.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 315842438021 in words is "three hundred fifteen billion, eight hundred forty-two million, four hundred thirty-eight thousand, twenty-one".