501438231 has 12 divisors (see below), whose sum is σ = 827771152. Its totient is φ = 286536096.

The previous prime is 501438229. The next prime is 501438269. The reversal of 501438231 is 132834105.

It is a happy number.

It is not a de Polignac number, because 501438231 - 2¹ = 501438229 is a prime.

It is a super-2 number, since 2×501438231² = 502880599016818722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 501438195 and 501438204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501438211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3979606 + ... + 3979731.

Almost surely, 2^501438231 is an apocalyptic number.

501438231 is a deficient number, since it is larger than the sum of its proper divisors (326332921).

501438231 is a wasteful number, since it uses less digits than its factorization.

501438231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7959350 (or 7959347 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 501438231 is about 22392.8165044061. The cubic root of 501438231 is about 794.4608139371.

The spelling of 501438231 in words is "five hundred one million, four hundred thirty-eight thousand, two hundred thirty-one".