97220000 has 60 divisors (see below), whose sum is σ = 239224986. Its totient is φ = 38880000.

The previous prime is 97219981. The next prime is 97220003. The reversal of 97220000 is 2279.

It can be written as a sum of positive squares in 5 ways, for example, as 11916304 + 85303696 = 3452^2 + 9236^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (97220003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 17570 + ... + 22430.

Almost surely, 2^97220000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119612493).

97220000 is an abundant number, since it is smaller than the sum of its proper divisors (142004986).

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

97220000 is an equidigital number, since it uses as much as digits as its factorization.

97220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4891 (or 4868 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 97220000 is about 9860.0202839548. The cubic root of 97220000 is about 459.8171926410.

Adding to 97220000 its reverse (2279), we get a palindrome (97222279).

The spelling of 97220000 in words is "ninety-seven million, two hundred twenty thousand".