91025751 has 32 divisors (see below), whose sum is σ = 134784000. Its totient is φ = 54407808.

The previous prime is 91025719. The next prime is 91025771. The reversal of 91025751 is 15752019.

It is not a de Polignac number, because 91025751 - 2⁵ = 91025719 is a prime.

It is a super-2 number, since 2×91025751² = 16571374690228002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91025771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87090 + ... + 88128.

It is an arithmetic number, because the mean of its divisors is an integer number (4212000).

Almost surely, 2^91025751 is an apocalyptic number.

91025751 is a deficient number, since it is larger than the sum of its proper divisors (43758249).

91025751 is a wasteful number, since it uses less digits than its factorization.

91025751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143.

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 91025751 is about 9540.7416378393. The cubic root of 91025751 is about 449.8365678119.

The spelling of 91025751 in words is "ninety-one million, twenty-five thousand, seven hundred fifty-one".