15210215056 has 10 divisors (see below), whose sum is σ = 29469791702. Its totient is φ = 7605107520.

The previous prime is 15210215023. The next prime is 15210215057. The reversal of 15210215056 is 65051201251.

It can be written as a sum of positive squares in only one way, i.e., 11638957456 + 3571257600 = 107884^2 + 59760^2 .

It is not an unprimeable number, because it can be changed into a prime (15210215057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 475319205 + ... + 475319236.

Almost surely, 2^15210215056 is an apocalyptic number.

15210215056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15210215056 is a deficient number, since it is larger than the sum of its proper divisors (14259576646).

15210215056 is an equidigital number, since it uses as much as digits as its factorization.

15210215056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950638449 (or 950638443 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 15210215056 in words is "fifteen billion, two hundred ten million, two hundred fifteen thousand, fifty-six".