21477314232251 has 8 divisors (see below), whose sum is σ = 22111713207840. Its totient is φ = 20845753731648.

The previous prime is 21477314232113. The next prime is 21477314232277. The reversal of 21477314232251 is 15223241377412.

It is a happy number.

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

It is not a de Polignac number, because 21477314232251 - 2¹⁸ = 21477313970107 is a prime.

It is a super-2 number, since 2×21477314232251² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21477314202251) 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, 709603391 + ... + 709633656.

It is an arithmetic number, because the mean of its divisors is an integer number (2763964150980).

Almost surely, 2^{21477314232251} is an apocalyptic number.

21477314232251 is a deficient number, since it is larger than the sum of its proper divisors (634398975589).

21477314232251 is a wasteful number, since it uses less digits than its factorization.

21477314232251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419237493.

The product of its digits is 564480, while the sum is 44.

The spelling of 21477314232251 in words is "twenty-one trillion, four hundred seventy-seven billion, three hundred fourteen million, two hundred thirty-two thousand, two hundred fifty-one".