231378505775 has 12 divisors (see below), whose sum is σ = 287658469632. Its totient is φ = 184619499840.

The previous prime is 231378505693. The next prime is 231378505781. The reversal of 231378505775 is 577505873132.

It is not a de Polignac number, because 231378505775 - 2¹⁰ = 231378504751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12072854 + ... + 12092003.

It is an arithmetic number, because the mean of its divisors is an integer number (23971539136).

Almost surely, 2^231378505775 is an apocalyptic number.

231378505775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

231378505775 is a deficient number, since it is larger than the sum of its proper divisors (56279963857).

231378505775 is a wasteful number, since it uses less digits than its factorization.

231378505775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24165250 (or 24165245 counting only the distinct ones).

The product of its (nonzero) digits is 6174000, while the sum is 53.

The spelling of 231378505775 in words is "two hundred thirty-one billion, three hundred seventy-eight million, five hundred five thousand, seven hundred seventy-five".