53503131 has 32 divisors (see below), whose sum is σ = 82937088. Its totient is φ = 30320640.

The previous prime is 53503123. The next prime is 53503157. The reversal of 53503131 is 13130535.

It is a happy number.

It is not a de Polignac number, because 53503131 - 2³ = 53503123 is a prime.

It is a super-2 number, since 2×53503131² = 5725170053606322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53503098 and 53503107.

It is not an unprimeable number, because it can be changed into a prime (53503181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158595 + ... + 158931.

It is an arithmetic number, because the mean of its divisors is an integer number (2591784).

Almost surely, 2^53503131 is an apocalyptic number.

53503131 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

53503131 is a deficient number, since it is larger than the sum of its proper divisors (29433957).

53503131 is a wasteful number, since it uses less digits than its factorization.

53503131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651.

The product of its (nonzero) digits is 675, while the sum is 21.

The square root of 53503131 is about 7314.5834467863. The cubic root of 53503131 is about 376.8134526798.

Adding to 53503131 its reverse (13130535), we get a palindrome (66633666).

The spelling of 53503131 in words is "fifty-three million, five hundred three thousand, one hundred thirty-one".