97812231 has 16 divisors (see below), whose sum is σ = 143607168. Its totient is φ = 58724000.

The previous prime is 97812179. The next prime is 97812233. The reversal of 97812231 is 13221879.

It is a cyclic number.

It is not a de Polignac number, because 97812231 - 2⁷ = 97812103 is a prime.

It is a super-2 number, since 2×97812231² = 19134465066394722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 97812192 and 97812201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97812233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10320 + ... + 17381.

It is an arithmetic number, because the mean of its divisors is an integer number (8975448).

Almost surely, 2^97812231 is an apocalyptic number.

97812231 is a deficient number, since it is larger than the sum of its proper divisors (45794937).

97812231 is a wasteful number, since it uses less digits than its factorization.

97812231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27822.

The product of its digits is 6048, while the sum is 33.

The square root of 97812231 is about 9890.0066228491. The cubic root of 97812231 is about 460.7489861799.

The spelling of 97812231 in words is "ninety-seven million, eight hundred twelve thousand, two hundred thirty-one".