501338431 has 4 divisors (see below), whose sum is σ = 546914664. Its totient is φ = 455762200.

The previous prime is 501338423. The next prime is 501338437. The reversal of 501338431 is 134833105.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 501338431 - 2³ = 501338423 is a prime.

It is a super-2 number, since 2×501338431² = 502680444795083522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 501338431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501338437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22788100 + ... + 22788121.

It is an arithmetic number, because the mean of its divisors is an integer number (136728666).

Almost surely, 2^501338431 is an apocalyptic number.

501338431 is a deficient number, since it is larger than the sum of its proper divisors (45576233).

501338431 is a wasteful number, since it uses less digits than its factorization.

501338431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45576232.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 501338431 is about 22390.5880003183. The cubic root of 501338431 is about 794.4081039221.

It can be divided in two parts, 50133 and 8431, that added together give a square (58564 = 242²).

The spelling of 501338431 in words is "five hundred one million, three hundred thirty-eight thousand, four hundred thirty-one".