215651025122 has 16 divisors (see below), whose sum is σ = 353265820992. Its totient is φ = 98129393040.

The previous prime is 215651025053. The next prime is 215651025131. The reversal of 215651025122 is 221520156512.

It is a happy number.

It is a super-2 number, since 2×215651025122² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58408508 + ... + 58412199.

It is an arithmetic number, because the mean of its divisors is an integer number (22079113812).

Almost surely, 2^215651025122 is an apocalyptic number.

215651025122 is a deficient number, since it is larger than the sum of its proper divisors (137614795870).

215651025122 is a wasteful number, since it uses less digits than its factorization.

215651025122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116820793.

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 215651025122 in words is "two hundred fifteen billion, six hundred fifty-one million, twenty-five thousand, one hundred twenty-two".