91222002 has 48 divisors (see below), whose sum is σ = 217114560. Its totient is φ = 27552096.

The previous prime is 91221989. The next prime is 91222003. The reversal of 91222002 is 20022219.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (91222003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2068 + ... + 13664.

It is an arithmetic number, because the mean of its divisors is an integer number (4523220).

Almost surely, 2^91222002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91222002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108557280).

91222002 is an abundant number, since it is smaller than the sum of its proper divisors (125892558).

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

91222002 is a wasteful number, since it uses less digits than its factorization.

91222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11647 (or 11644 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 91222002 is about 9551.0209925432. The cubic root of 91222002 is about 450.1596174502.

The spelling of 91222002 in words is "ninety-one million, two hundred twenty-two thousand, two".