91215048 has 32 divisors (see below), whose sum is σ = 240040800. Its totient is φ = 28804608.

The previous prime is 91215041. The next prime is 91215053. The reversal of 91215048 is 84051219.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91215041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99561 + ... + 100472.

It is an arithmetic number, because the mean of its divisors is an integer number (7501275).

Almost surely, 2^91215048 is an apocalyptic number.

It is an amenable number.

91215048 is an abundant number, since it is smaller than the sum of its proper divisors (148825752).

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

91215048 is a wasteful number, since it uses less digits than its factorization.

91215048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200061 (or 200057 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 91215048 is about 9550.6569407554. The cubic root of 91215048 is about 450.1481783622.

The spelling of 91215048 in words is "ninety-one million, two hundred fifteen thousand, forty-eight".