231401383 has 2 divisors, whose sum is σ = 231401384. Its totient is φ = 231401382.

The previous prime is 231401371. The next prime is 231401407. The reversal of 231401383 is 383104132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231401383 is a prime.

It is equal to p_12715504 and since 231401383 and 12715504 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231401333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115700691 + 115700692.

It is an arithmetic number, because the mean of its divisors is an integer number (115700692).

Almost surely, 2^231401383 is an apocalyptic number.

231401383 is a deficient number, since it is larger than the sum of its proper divisors (1).

231401383 is an equidigital number, since it uses as much as digits as its factorization.

231401383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 231401383 is about 15211.8829537964. The cubic root of 231401383 is about 613.9344211244.

The spelling of 231401383 in words is "two hundred thirty-one million, four hundred one thousand, three hundred eighty-three".