215451002 has 16 divisors (see below), whose sum is σ = 350102760. Its totient is φ = 99436896.

The previous prime is 215451001. The next prime is 215451007. The reversal of 215451002 is 200154512.

It can be written as a sum of positive squares in 4 ways, for example, as 271441 + 215179561 = 521^2 + 14669^2 .

It is not an unprimeable number, because it can be changed into a prime (215451001) 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, 20123 + ... + 28910.

Almost surely, 2^215451002 is an apocalyptic number.

215451002 is a deficient number, since it is larger than the sum of its proper divisors (134651758).

215451002 is an equidigital number, since it uses as much as digits as its factorization.

215451002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49074 (or 49048 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 215451002 is about 14678.2492825269. The cubic root of 215451002 is about 599.4912372412.

The spelling of 215451002 in words is "two hundred fifteen million, four hundred fifty-one thousand, two".