315154521021 has 8 divisors (see below), whose sum is σ = 420265974240. Its totient is φ = 210073040912.

The previous prime is 315154521013. The next prime is 315154521037. The reversal of 315154521021 is 120125451513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 315154521021 - 2³ = 315154521013 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 315154521021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315154921021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7468731 + ... + 7510808.

It is an arithmetic number, because the mean of its divisors is an integer number (52533246780).

Almost surely, 2^315154521021 is an apocalyptic number.

It is an amenable number.

315154521021 is a deficient number, since it is larger than the sum of its proper divisors (105111453219).

315154521021 is a wasteful number, since it uses less digits than its factorization.

315154521021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14986555.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 315154521021 its reverse (120125451513), we get a palindrome (435279972534).

The spelling of 315154521021 in words is "three hundred fifteen billion, one hundred fifty-four million, five hundred twenty-one thousand, twenty-one".