215142945 has 16 divisors (see below), whose sum is σ = 355333632. Its totient is φ = 111041280.

The previous prime is 215142937. The next prime is 215142959. The reversal of 215142945 is 549241512.

It is not a de Polignac number, because 215142945 - 2³ = 215142937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230872 + ... + 231801.

It is an arithmetic number, because the mean of its divisors is an integer number (22208352).

Almost surely, 2^215142945 is an apocalyptic number.

It is an amenable number.

215142945 is a deficient number, since it is larger than the sum of its proper divisors (140190687).

215142945 is a wasteful number, since it uses less digits than its factorization.

215142945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462712.

The product of its digits is 14400, while the sum is 33.

The square root of 215142945 is about 14667.7518727309. The cubic root of 215142945 is about 599.2053786483.

The spelling of 215142945 in words is "two hundred fifteen million, one hundred forty-two thousand, nine hundred forty-five".