91031202 has 48 divisors (see below), whose sum is σ = 206754912. Its totient is φ = 30015360.

The previous prime is 91031197. The next prime is 91031249. The reversal of 91031202 is 20213019.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46177 + ... + 48107.

It is an arithmetic number, because the mean of its divisors is an integer number (4307394).

Almost surely, 2^91031202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91031202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103377456).

91031202 is an abundant number, since it is smaller than the sum of its proper divisors (115723710).

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

91031202 is a wasteful number, since it uses less digits than its factorization.

91031202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045 (or 2033 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 91031202 is about 9541.0273031786. The cubic root of 91031202 is about 449.8455469933.

The spelling of 91031202 in words is "ninety-one million, thirty-one thousand, two hundred two".