91226015 has 4 divisors (see below), whose sum is σ = 109471224. Its totient is φ = 72980808.

The previous prime is 91225999. The next prime is 91226033. The reversal of 91226015 is 51062219.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91226015 - 2⁴ = 91225999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9122597 + ... + 9122606.

It is an arithmetic number, because the mean of its divisors is an integer number (27367806).

Almost surely, 2^91226015 is an apocalyptic number.

91226015 is a deficient number, since it is larger than the sum of its proper divisors (18245209).

91226015 is a wasteful number, since it uses less digits than its factorization.

91226015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18245208.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 91226015 is about 9551.2310724848. The cubic root of 91226015 is about 450.1662184310.

The spelling of 91226015 in words is "ninety-one million, two hundred twenty-six thousand, fifteen".