215530402552 has 8 divisors (see below), whose sum is σ = 404119504800. Its totient is φ = 107765201272.

The previous prime is 215530402547. The next prime is 215530402573. The reversal of 215530402552 is 255204035512.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×215530402552² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13470650152 + ... + 13470650167.

It is an arithmetic number, because the mean of its divisors is an integer number (50514938100).

Almost surely, 2^215530402552 is an apocalyptic number.

It is an amenable number.

215530402552 is a deficient number, since it is larger than the sum of its proper divisors (188589102248).

215530402552 is a wasteful number, since it uses less digits than its factorization.

215530402552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26941300325 (or 26941300321 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 34.

The spelling of 215530402552 in words is "two hundred fifteen billion, five hundred thirty million, four hundred two thousand, five hundred fifty-two".