21215372262 has 32 divisors (see below), whose sum is σ = 48536589312. Its totient is φ = 6055996224.

The previous prime is 21215372261. The next prime is 21215372267. The reversal of 21215372262 is 26227351212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21215372261) by changing a digit.

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, 184158 + ... + 276305.

It is an arithmetic number, because the mean of its divisors is an integer number (1516768416).

Almost surely, 2^21215372262 is an apocalyptic number.

21215372262 is an abundant number, since it is smaller than the sum of its proper divisors (27321217050).

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

21215372262 is a wasteful number, since it uses less digits than its factorization.

21215372262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461572.

The product of its digits is 20160, while the sum is 33.

The spelling of 21215372262 in words is "twenty-one billion, two hundred fifteen million, three hundred seventy-two thousand, two hundred sixty-two".