53117730 has 48 divisors (see below), whose sum is σ = 145379520. Its totient is φ = 13418784.

The previous prime is 53117693. The next prime is 53117761. The reversal of 53117730 is 3771135.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 53117694 and 53117703.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13822 + ... + 17241.

It is an arithmetic number, because the mean of its divisors is an integer number (3028740).

Almost surely, 2^53117730 is an apocalyptic number.

53117730 is an abundant number, since it is smaller than the sum of its proper divisors (92261790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53117730 is a wasteful number, since it uses less digits than its factorization.

53117730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31095 (or 31092 counting only the distinct ones).

The product of its (nonzero) digits is 2205, while the sum is 27.

The square root of 53117730 is about 7288.1911336078. The cubic root of 53117730 is about 375.9065002537.

Adding to 53117730 its reverse (3771135), we get a palindrome (56888865).

It can be divided in two parts, 5311 and 7730, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 53117730 in words is "fifty-three million, one hundred seventeen thousand, seven hundred thirty".