501148631 has 2 divisors, whose sum is σ = 501148632. Its totient is φ = 501148630.

The previous prime is 501148621. The next prime is 501148643. The reversal of 501148631 is 136841105.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501148631 is a prime.

It is a super-2 number, since 2×501148631² = 502299900706348322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 501148594 and 501148603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501148621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250574315 + 250574316.

It is an arithmetic number, because the mean of its divisors is an integer number (250574316).

Almost surely, 2^501148631 is an apocalyptic number.

501148631 is a deficient number, since it is larger than the sum of its proper divisors (1).

501148631 is an equidigital number, since it uses as much as digits as its factorization.

501148631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 501148631 is about 22386.3492110706. The cubic root of 501148631 is about 794.3078405203.

Adding to 501148631 its reverse (136841105), we get a palindrome (637989736).

The spelling of 501148631 in words is "five hundred one million, one hundred forty-eight thousand, six hundred thirty-one".