22145251447231 has 16 divisors (see below), whose sum is σ = 24900334419456. Its totient is φ = 19523111580000.

The previous prime is 22145251447223. The next prime is 22145251447243. The reversal of 22145251447231 is 13274415254122.

It is a cyclic number.

It is not a de Polignac number, because 22145251447231 - 2³ = 22145251447223 is a prime.

It is a super-2 number, since 2×22145251447231² (a number of 27 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 (22145251447831) 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, 232370355 + ... + 232465636.

It is an arithmetic number, because the mean of its divisors is an integer number (1556270901216).

Almost surely, 2^{22145251447231} is an apocalyptic number.

22145251447231 is a deficient number, since it is larger than the sum of its proper divisors (2755082972225).

22145251447231 is a wasteful number, since it uses less digits than its factorization.

22145251447231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464836134.

The product of its digits is 537600, while the sum is 43.

The spelling of 22145251447231 in words is "twenty-two trillion, one hundred forty-five billion, two hundred fifty-one million, four hundred forty-seven thousand, two hundred thirty-one".