20151530315 has 32 divisors (see below), whose sum is σ = 28551536640. Its totient is φ = 13361356800.

The previous prime is 20151530297. The next prime is 20151530317. The reversal of 20151530315 is 51303515102.

It is a happy number.

It is not a de Polignac number, because 20151530315 - 2¹⁰ = 20151529291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20151530317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1424075 + ... + 1438155.

It is an arithmetic number, because the mean of its divisors is an integer number (892235520).

Almost surely, 2^20151530315 is an apocalyptic number.

20151530315 is a deficient number, since it is larger than the sum of its proper divisors (8400006325).

20151530315 is a wasteful number, since it uses less digits than its factorization.

20151530315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15443.

The product of its (nonzero) digits is 2250, while the sum is 26.

The spelling of 20151530315 in words is "twenty billion, one hundred fifty-one million, five hundred thirty thousand, three hundred fifteen".