507731431 has 2 divisors, whose sum is σ = 507731432. Its totient is φ = 507731430.

The previous prime is 507731429. The next prime is 507731461. The reversal of 507731431 is 134137705.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 507731431 - 2¹ = 507731429 is a prime.

It is a super-3 number, since 3×507731431³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 507731429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 507731393 and 507731402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (507731461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253865715 + 253865716.

It is an arithmetic number, because the mean of its divisors is an integer number (253865716).

Almost surely, 2^507731431 is an apocalyptic number.

507731431 is a deficient number, since it is larger than the sum of its proper divisors (1).

507731431 is an equidigital number, since it uses as much as digits as its factorization.

507731431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 507731431 is about 22532.8966402458. The cubic root of 507731431 is about 797.7705798578.

The spelling of 507731431 in words is "five hundred seven million, seven hundred thirty-one thousand, four hundred thirty-one".