505013125031 has 4 divisors (see below), whose sum is σ = 505017385200. Its totient is φ = 505008864864.

The previous prime is 505013125007. The next prime is 505013125033. The reversal of 505013125031 is 130521310505.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505013125031 is a prime.

It is a super-2 number, since 2×505013125031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505013125033) 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, 1947026 + ... + 2191103.

It is an arithmetic number, because the mean of its divisors is an integer number (126254346300).

Almost surely, 2^505013125031 is an apocalyptic number.

505013125031 is a deficient number, since it is larger than the sum of its proper divisors (4260169).

505013125031 is a wasteful number, since it uses less digits than its factorization.

505013125031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260168.

The product of its (nonzero) digits is 2250, while the sum is 26.

Adding to 505013125031 its reverse (130521310505), we get a palindrome (635534435536).

The spelling of 505013125031 in words is "five hundred five billion, thirteen million, one hundred twenty-five thousand, thirty-one".