91221062 has 8 divisors (see below), whose sum is σ = 137105136. Its totient is φ = 45519352.

The previous prime is 91221061. The next prime is 91221073. The reversal of 91221062 is 26012219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91221061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44333 + ... + 46344.

It is an arithmetic number, because the mean of its divisors is an integer number (17138142).

Almost surely, 2^91221062 is an apocalyptic number.

91221062 is a deficient number, since it is larger than the sum of its proper divisors (45884074).

91221062 is a wasteful number, since it uses less digits than its factorization.

91221062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91182.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 91221062 is about 9550.9717830177. The cubic root of 91221062 is about 450.1580712169.

The spelling of 91221062 in words is "ninety-one million, two hundred twenty-one thousand, sixty-two".