385687412531 has 2 divisors, whose sum is σ = 385687412532. Its totient is φ = 385687412530.

The previous prime is 385687412507. The next prime is 385687412543. The reversal of 385687412531 is 135214786583.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385687412531 is a prime.

It is a super-2 number, since 2×385687412531² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (385687312531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192843706265 + 192843706266.

It is an arithmetic number, because the mean of its divisors is an integer number (192843706266).

Almost surely, 2^385687412531 is an apocalyptic number.

385687412531 is a deficient number, since it is larger than the sum of its proper divisors (1).

385687412531 is an equidigital number, since it uses as much as digits as its factorization.

385687412531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 53.

The spelling of 385687412531 in words is "three hundred eighty-five billion, six hundred eighty-seven million, four hundred twelve thousand, five hundred thirty-one".