99951331 has 2 divisors, whose sum is σ = 99951332. Its totient is φ = 99951330.

The previous prime is 99951323. The next prime is 99951377. The reversal of 99951331 is 13315999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99951331 - 2³ = 99951323 is a prime.

It is a super-2 number, since 2×99951331² = 19980537137343122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99951301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49975665 + 49975666.

It is an arithmetic number, because the mean of its divisors is an integer number (49975666).

Almost surely, 2^99951331 is an apocalyptic number.

99951331 is a deficient number, since it is larger than the sum of its proper divisors (1).

99951331 is an equidigital number, since it uses as much as digits as its factorization.

99951331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32805, while the sum is 40.

The square root of 99951331 is about 9997.5662538440. The cubic root of 99951331 is about 464.0835706463.

The spelling of 99951331 in words is "ninety-nine million, nine hundred fifty-one thousand, three hundred thirty-one".