21215603310 has 32 divisors (see below), whose sum is σ = 55546307712. Its totient is φ = 5143176480.

The previous prime is 21215603303. The next prime is 21215603327. The reversal of 21215603310 is 1330651212.

It is a super-2 number, since 2×21215603310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 32144524 + ... + 32145183.

It is an arithmetic number, because the mean of its divisors is an integer number (1735822116).

Almost surely, 2^21215603310 is an apocalyptic number.

21215603310 is an abundant number, since it is smaller than the sum of its proper divisors (34330704402).

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

21215603310 is a wasteful number, since it uses less digits than its factorization.

21215603310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64289728.

The product of its (nonzero) digits is 1080, while the sum is 24.

The spelling of 21215603310 in words is "twenty-one billion, two hundred fifteen million, six hundred three thousand, three hundred ten".