215152638 has 16 divisors (see below), whose sum is σ = 430459536. Its totient is φ = 71691840.

The previous prime is 215152589. The next prime is 215152667. The reversal of 215152638 is 836251512.

It is a junction number, because it is equal to n+sod(n) for n = 215152599 and 215152608.

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, 20178 + ... + 28938.

It is an arithmetic number, because the mean of its divisors is an integer number (26903721).

Almost surely, 2^215152638 is an apocalyptic number.

215152638 is an abundant number, since it is smaller than the sum of its proper divisors (215306898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215152638 is a wasteful number, since it uses less digits than its factorization.

215152638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12859.

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

The square root of 215152638 is about 14668.0822877430. The cubic root of 215152638 is about 599.2143773329.

The spelling of 215152638 in words is "two hundred fifteen million, one hundred fifty-two thousand, six hundred thirty-eight".