53117240 has 32 divisors (see below), whose sum is σ = 130379760. Its totient is φ = 19315200.

The previous prime is 53117227. The next prime is 53117257. The reversal of 53117240 is 4271135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59921 + ... + 60800.

Almost surely, 2^53117240 is an apocalyptic number.

It is an amenable number.

53117240 is an abundant number, since it is smaller than the sum of its proper divisors (77262520).

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

53117240 is a wasteful number, since it uses less digits than its factorization.

53117240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120743 (or 120739 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 53117240 is about 7288.1575175074. The cubic root of 53117240 is about 375.9053443638.

Adding to 53117240 its reverse (4271135), we get a palindrome (57388375).

It can be divided in two parts, 531 and 17240, that added together give a palindrome (17771).

The spelling of 53117240 in words is "fifty-three million, one hundred seventeen thousand, two hundred forty".