91472251 has 16 divisors (see below), whose sum is σ = 106506400. Its totient is φ = 77822208.

The previous prime is 91472239. The next prime is 91472263. The reversal of 91472251 is 15227419.

It is an interprime number because it is at equal distance from previous prime (91472239) and next prime (91472263).

It is a cyclic number.

It is not a de Polignac number, because 91472251 - 2²⁵ = 57917819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91472281) 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, 4135 + ... + 14143.

It is an arithmetic number, because the mean of its divisors is an integer number (6656650).

Almost surely, 2^91472251 is an apocalyptic number.

91472251 is a deficient number, since it is larger than the sum of its proper divisors (15034149).

91472251 is a wasteful number, since it uses less digits than its factorization.

91472251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10078.

The product of its digits is 5040, while the sum is 31.

The square root of 91472251 is about 9564.1126614025. The cubic root of 91472251 is about 450.5708820419.

The spelling of 91472251 in words is "ninety-one million, four hundred seventy-two thousand, two hundred fifty-one".