91152431 has 4 divisors (see below), whose sum is σ = 94092864. Its totient is φ = 88212000.

The previous prime is 91152409. The next prime is 91152469. The reversal of 91152431 is 13425119.

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

It is a cyclic number.

It is not a de Polignac number, because 91152431 - 2¹⁰ = 91151407 is a prime.

It is a super-2 number, since 2×91152431² = 16617531354419522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91152431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91152031) 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, 1470170 + ... + 1470231.

It is an arithmetic number, because the mean of its divisors is an integer number (23523216).

Almost surely, 2^91152431 is an apocalyptic number.

91152431 is a deficient number, since it is larger than the sum of its proper divisors (2940433).

91152431 is a wasteful number, since it uses less digits than its factorization.

91152431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940432.

The product of its digits is 1080, while the sum is 26.

The square root of 91152431 is about 9547.3782265081. The cubic root of 91152431 is about 450.0451493794.

The spelling of 91152431 in words is "ninety-one million, one hundred fifty-two thousand, four hundred thirty-one".