215545142 has 16 divisors (see below), whose sum is σ = 342707760. Its totient is φ = 101323008.

The previous prime is 215545133. The next prime is 215545153. The reversal of 215545142 is 241545512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34409 + ... + 40187.

It is an arithmetic number, because the mean of its divisors is an integer number (21419235).

Almost surely, 2^215545142 is an apocalyptic number.

215545142 is a deficient number, since it is larger than the sum of its proper divisors (127162618).

215545142 is a wasteful number, since it uses less digits than its factorization.

215545142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6895.

The product of its digits is 8000, while the sum is 29.

The square root of 215545142 is about 14681.4557180138. The cubic root of 215545142 is about 599.5785392058.

The spelling of 215545142 in words is "two hundred fifteen million, five hundred forty-five thousand, one hundred forty-two".