505240433631 has 16 divisors (see below), whose sum is σ = 755915284320. Its totient is φ = 333492033600.

The previous prime is 505240433627. The next prime is 505240433639. The reversal of 505240433631 is 136334042505.

505240433631 is a `hidden beast` number, since 50 + 5 + 240 + 4 + 3 + 363 + 1 = 666.

It is not a de Polignac number, because 505240433631 - 2² = 505240433627 is a prime.

It is a super-2 number, since 2×505240433631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505240433639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92633950 + ... + 92639403.

It is an arithmetic number, because the mean of its divisors is an integer number (47244705270).

Almost surely, 2^505240433631 is an apocalyptic number.

505240433631 is a deficient number, since it is larger than the sum of its proper divisors (250674850689).

505240433631 is a wasteful number, since it uses less digits than its factorization.

505240433631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185273463 (or 185273457 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The spelling of 505240433631 in words is "five hundred five billion, two hundred forty million, four hundred thirty-three thousand, six hundred thirty-one".