215252051 has 20 divisors (see below), whose sum is σ = 258005712. Its totient is φ = 179441136.

The previous prime is 215252029. The next prime is 215252077. The reversal of 215252051 is 150252512.

It is a de Polignac number, because none of the positive numbers 2^k-215252051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215252651) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 87626 + ... + 90048.

Almost surely, 2^215252051 is an apocalyptic number.

215252051 is a deficient number, since it is larger than the sum of its proper divisors (42753661).

215252051 is an frugal number, since it uses more digits than its factorization.

215252051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488 (or 2467 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 215252051 is about 14671.4706488477. The cubic root of 215252051 is about 599.3066537232.

The spelling of 215252051 in words is "two hundred fifteen million, two hundred fifty-two thousand, fifty-one".