91222270 has 16 divisors (see below), whose sum is σ = 165304800. Its totient is φ = 36243424.

The previous prime is 91222223. The next prime is 91222277. The reversal of 91222270 is 7222219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91222277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29122 + ... + 32101.

It is an arithmetic number, because the mean of its divisors is an integer number (10331550).

Almost surely, 2^91222270 is an apocalyptic number.

91222270 is a deficient number, since it is larger than the sum of its proper divisors (74082530).

91222270 is a wasteful number, since it uses less digits than its factorization.

91222270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61379.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 91222270 is about 9551.0350224465. The cubic root of 91222270 is about 450.1600582892.

Adding to 91222270 its reverse (7222219), we get a palindrome (98444489).

The spelling of 91222270 in words is "ninety-one million, two hundred twenty-two thousand, two hundred seventy".