21255254435562 has 32 divisors (see below), whose sum is σ = 48588488312832. Its totient is φ = 6072298638384.

The previous prime is 21255254435557. The next prime is 21255254435573. The reversal of 21255254435562 is 26553445255212.

It is a happy number.

It is a super-2 number, since 2×21255254435562² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25891038 + ... + 26699369.

It is an arithmetic number, because the mean of its divisors is an integer number (1518390259776).

Almost surely, 2^{21255254435562} is an apocalyptic number.

21255254435562 is an abundant number, since it is smaller than the sum of its proper divisors (27333233877270).

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

21255254435562 is a wasteful number, since it uses less digits than its factorization.

21255254435562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52600042.

The product of its digits is 14400000, while the sum is 51.

The spelling of 21255254435562 in words is "twenty-one trillion, two hundred fifty-five billion, two hundred fifty-four million, four hundred thirty-five thousand, five hundred sixty-two".