2151057557218 has 64 divisors (see below), whose sum is σ = 3311523072000. Its totient is φ = 1047743714304.

The previous prime is 2151057557203. The next prime is 2151057557239. The reversal of 2151057557218 is 8127557501512.

It is a super-2 number, since 2×2151057557218² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2070314743 + ... + 2070315781.

It is an arithmetic number, because the mean of its divisors is an integer number (51742548000).

Almost surely, 2^{2151057557218} is an apocalyptic number.

2151057557218 is a deficient number, since it is larger than the sum of its proper divisors (1160465514782).

2151057557218 is a wasteful number, since it uses less digits than its factorization.

2151057557218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859.

The product of its (nonzero) digits is 980000, while the sum is 49.

The spelling of 2151057557218 in words is "two trillion, one hundred fifty-one billion, fifty-seven million, five hundred fifty-seven thousand, two hundred eighteen".