91351020 has 24 divisors (see below), whose sum is σ = 255783024. Its totient is φ = 24360256.

The previous prime is 91351019. The next prime is 91351027. The reversal of 91351020 is 2015319.

It is not an unprimeable number, because it can be changed into a prime (91351027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761199 + ... + 761318.

It is an arithmetic number, because the mean of its divisors is an integer number (10657626).

Almost surely, 2^91351020 is an apocalyptic number.

It is an amenable number.

91351020 is an abundant number, since it is smaller than the sum of its proper divisors (164432004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91351020 is a wasteful number, since it uses less digits than its factorization.

91351020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522529 (or 1522527 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 91351020 is about 9557.7727531052. The cubic root of 91351020 is about 450.3717422042.

Adding to 91351020 its reverse (2015319), we get a palindrome (93366339).

The spelling of 91351020 in words is "ninety-one million, three hundred fifty-one thousand, twenty".