385099331 has 2 divisors, whose sum is σ = 385099332. Its totient is φ = 385099330.

The previous prime is 385099321. The next prime is 385099397. The reversal of 385099331 is 133990583.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385099331 is a prime.

It is a super-2 number, since 2×385099331² = 296602989473295122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (385099321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192549665 + 192549666.

It is an arithmetic number, because the mean of its divisors is an integer number (192549666).

Almost surely, 2^385099331 is an apocalyptic number.

385099331 is a deficient number, since it is larger than the sum of its proper divisors (1).

385099331 is an equidigital number, since it uses as much as digits as its factorization.

385099331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 385099331 is about 19623.9478953650. The cubic root of 385099331 is about 727.5411932918.

The spelling of 385099331 in words is "three hundred eighty-five million, ninety-nine thousand, three hundred thirty-one".