97555331 has 2 divisors, whose sum is σ = 97555332. Its totient is φ = 97555330.

The previous prime is 97555321. The next prime is 97555361. The reversal of 97555331 is 13355579.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97555331 - 2⁶ = 97555267 is a prime.

It is a super-2 number, since 2×97555331² = 19034085213039122, which contains 22 as substring.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (97555301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48777665 + 48777666.

It is an arithmetic number, because the mean of its divisors is an integer number (48777666).

Almost surely, 2^97555331 is an apocalyptic number.

97555331 is a deficient number, since it is larger than the sum of its proper divisors (1).

97555331 is an equidigital number, since it uses as much as digits as its factorization.

97555331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70875, while the sum is 38.

The square root of 97555331 is about 9877.0102257718. The cubic root of 97555331 is about 460.3452527781.

The spelling of 97555331 in words is "ninety-seven million, five hundred fifty-five thousand, three hundred thirty-one".