89155231 has 4 divisors (see below), whose sum is σ = 97260264. Its totient is φ = 81050200.

The previous prime is 89155207. The next prime is 89155243. The reversal of 89155231 is 13255198.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 89155231 - 2⁷ = 89155103 is a prime.

It is a super-2 number, since 2×89155231² = 15897310429326722, which 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 (89155271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4052500 + ... + 4052521.

It is an arithmetic number, because the mean of its divisors is an integer number (24315066).

Almost surely, 2^89155231 is an apocalyptic number.

89155231 is a deficient number, since it is larger than the sum of its proper divisors (8105033).

89155231 is a wasteful number, since it uses less digits than its factorization.

89155231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8105032.

The product of its digits is 10800, while the sum is 34.

The square root of 89155231 is about 9442.2047743099. The cubic root of 89155231 is about 446.7339343877.

The spelling of 89155231 in words is "eighty-nine million, one hundred fifty-five thousand, two hundred thirty-one".