88151981 has 2 divisors, whose sum is σ = 88151982. Its totient is φ = 88151980.

The previous prime is 88151971. The next prime is 88151983. The reversal of 88151981 is 18915188.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72675625 + 15476356 = 8525^2 + 3934^2 .

It is a cyclic number.

It is not a de Polignac number, because 88151981 - 2²² = 83957677 is a prime.

It is a super-2 number, since 2×88151981² = 15541543508448722, which contains 22 as substring.

Together with 88151983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88151983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44075990 + 44075991.

It is an arithmetic number, because the mean of its divisors is an integer number (44075991).

Almost surely, 2^88151981 is an apocalyptic number.

It is an amenable number.

88151981 is a deficient number, since it is larger than the sum of its proper divisors (1).

88151981 is an equidigital number, since it uses as much as digits as its factorization.

88151981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 41.

The square root of 88151981 is about 9388.9286396266. The cubic root of 88151981 is about 445.0519335088.

The spelling of 88151981 in words is "eighty-eight million, one hundred fifty-one thousand, nine hundred eighty-one".