23081155981 has 8 divisors (see below), whose sum is σ = 24886843520. Its totient is φ = 21279784752.

The previous prime is 23081155973. The next prime is 23081155991. The reversal of 23081155981 is 18955118032.

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

It is a cyclic number.

It is not a de Polignac number, because 23081155981 - 2³ = 23081155973 is a prime.

It is a super-2 number, since 2×23081155981² (a number of 22 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 (23081155931) 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, 1067961 + ... + 1089358.

It is an arithmetic number, because the mean of its divisors is an integer number (3110855440).

Almost surely, 2^23081155981 is an apocalyptic number.

It is an amenable number.

23081155981 is a deficient number, since it is larger than the sum of its proper divisors (1805687539).

23081155981 is a wasteful number, since it uses less digits than its factorization.

23081155981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158155.

The product of its (nonzero) digits is 86400, while the sum is 43.

The spelling of 23081155981 in words is "twenty-three billion, eighty-one million, one hundred fifty-five thousand, nine hundred eighty-one".