21232501275 has 24 divisors (see below), whose sum is σ = 35177748480. Its totient is φ = 11300340640.

The previous prime is 21232501231. The next prime is 21232501289. The reversal of 21232501275 is 57210523212.

It is not a de Polignac number, because 21232501275 - 2⁶ = 21232501211 is a prime.

It is a super-3 number, since 3×21232501275³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259587 + ... + 331436.

It is an arithmetic number, because the mean of its divisors is an integer number (1465739520).

Almost surely, 2^21232501275 is an apocalyptic number.

21232501275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21232501275 is a deficient number, since it is larger than the sum of its proper divisors (13945247205).

21232501275 is a wasteful number, since it uses less digits than its factorization.

21232501275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591515 (or 591510 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 21232501275 in words is "twenty-one billion, two hundred thirty-two million, five hundred one thousand, two hundred seventy-five".