72170401622231 has 16 divisors (see below), whose sum is σ = 78876131715360. Its totient is φ = 65488821050880.

The previous prime is 72170401622227. The next prime is 72170401622251. The reversal of 72170401622231 is 13222610407127.

It is a cyclic number.

It is not a de Polignac number, because 72170401622231 - 2² = 72170401622227 is a prime.

It is a super-2 number, since 2×72170401622231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72170401622251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77505545 + ... + 78431181.

It is an arithmetic number, because the mean of its divisors is an integer number (4929758232210).

Almost surely, 2^{72170401622231} is an apocalyptic number.

72170401622231 is a deficient number, since it is larger than the sum of its proper divisors (6705730093129).

72170401622231 is a wasteful number, since it uses less digits than its factorization.

72170401622231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938674.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 72170401622231 in words is "seventy-two trillion, one hundred seventy billion, four hundred one million, six hundred twenty-two thousand, two hundred thirty-one".