91057351 has 16 divisors (see below), whose sum is σ = 116299008. Its totient is φ = 69220800.

The previous prime is 91057319. The next prime is 91057381. The reversal of 91057351 is 15375019.

It is not a de Polignac number, because 91057351 - 2⁵ = 91057319 is a prime.

It is a super-2 number, since 2×91057351² = 16582882342274402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91057301) 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, 11265 + ... + 17578.

It is an arithmetic number, because the mean of its divisors is an integer number (7268688).

Almost surely, 2^91057351 is an apocalyptic number.

91057351 is a deficient number, since it is larger than the sum of its proper divisors (25241657).

91057351 is a wasteful number, since it uses less digits than its factorization.

91057351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28902.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 91057351 is about 9542.3975498823. The cubic root of 91057351 is about 449.8886160539. Note that the first 3 decimals are identical.

It can be divided in two parts, 9 and 1057351, that multiplied together give a palindrome (9516159).

The spelling of 91057351 in words is "ninety-one million, fifty-seven thousand, three hundred fifty-one".