385615532231 has 2 divisors, whose sum is σ = 385615532232. Its totient is φ = 385615532230.

The previous prime is 385615532201. The next prime is 385615532249. The reversal of 385615532231 is 132235516583.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 385615532231 - 2¹⁴ = 385615515847 is a prime.

It is a super-2 number, since 2×385615532231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385615532201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192807766115 + 192807766116.

It is an arithmetic number, because the mean of its divisors is an integer number (192807766116).

Almost surely, 2^385615532231 is an apocalyptic number.

385615532231 is a deficient number, since it is larger than the sum of its proper divisors (1).

385615532231 is an equidigital number, since it uses as much as digits as its factorization.

385615532231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 44.

The spelling of 385615532231 in words is "three hundred eighty-five billion, six hundred fifteen million, five hundred thirty-two thousand, two hundred thirty-one".