21270315275 has 12 divisors (see below), whose sum is σ = 28772935944. Its totient is φ = 15469320000.

The previous prime is 21270315239. The next prime is 21270315299. The reversal of 21270315275 is 57251307212.

It is not a de Polignac number, because 21270315275 - 2⁶ = 21270315211 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38673026 + ... + 38673575.

It is an arithmetic number, because the mean of its divisors is an integer number (2397744662).

Almost surely, 2^21270315275 is an apocalyptic number.

21270315275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21270315275 is a deficient number, since it is larger than the sum of its proper divisors (7502620669).

21270315275 is a wasteful number, since it uses less digits than its factorization.

21270315275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77346622 (or 77346617 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 21270315275 in words is "twenty-one billion, two hundred seventy million, three hundred fifteen thousand, two hundred seventy-five".