21523042225052 has 24 divisors (see below), whose sum is σ = 39881170647360. Its totient is φ = 10128429642240.

The previous prime is 21523042225043. The next prime is 21523042225063. The reversal of 21523042225052 is 25052224032512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11683949 + ... + 13400027.

It is an arithmetic number, because the mean of its divisors is an integer number (1661715443640).

Almost surely, 2^{21523042225052} is an apocalyptic number.

It is an amenable number.

21523042225052 is a deficient number, since it is larger than the sum of its proper divisors (18358128422308).

21523042225052 is a wasteful number, since it uses less digits than its factorization.

21523042225052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900541 (or 1900539 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 21523042225052 its reverse (25052224032512), we get a palindrome (46575266257564).

The spelling of 21523042225052 in words is "twenty-one trillion, five hundred twenty-three billion, forty-two million, two hundred twenty-five thousand, fifty-two".