21255256424253 has 8 divisors (see below), whose sum is σ = 28340843910400. Its totient is φ = 14169919943808.

The previous prime is 21255256424231. The next prime is 21255256424257. The reversal of 21255256424253 is 35242465255212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21255256424253 - 2⁴¹ = 19056233168701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21255256424257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62553748 + ... + 62892621.

It is an arithmetic number, because the mean of its divisors is an integer number (3542605488800).

Almost surely, 2^{21255256424253} is an apocalyptic number.

It is an amenable number.

21255256424253 is a deficient number, since it is larger than the sum of its proper divisors (7085587486147).

21255256424253 is a wasteful number, since it uses less digits than its factorization.

21255256424253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125502851.

The product of its digits is 5760000, while the sum is 48.

The spelling of 21255256424253 in words is "twenty-one trillion, two hundred fifty-five billion, two hundred fifty-six million, four hundred twenty-four thousand, two hundred fifty-three".