91072252 has 6 divisors (see below), whose sum is σ = 159376448. Its totient is φ = 45536124.

The previous prime is 91072243. The next prime is 91072277. The reversal of 91072252 is 25227019.

It is a self number, because there is not a number n which added to its sum of digits gives 91072252.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 11384028 + ... + 11384035.

Almost surely, 2^91072252 is an apocalyptic number.

It is an amenable number.

91072252 is a deficient number, since it is larger than the sum of its proper divisors (68304196).

91072252 is a wasteful number, since it uses less digits than its factorization.

91072252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22768067 (or 22768065 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 91072252 is about 9543.1782965635. The cubic root of 91072252 is about 449.9131552575.

The spelling of 91072252 in words is "ninety-one million, seventy-two thousand, two hundred fifty-two".