53157240 has 96 divisors (see below), whose sum is σ = 174096000. Its totient is φ = 14065920.

The previous prime is 53157227. The next prime is 53157253. The reversal of 53157240 is 4275135.

It is a happy number.

53157240 is a `hidden beast` number, since 53 + 1 + 572 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (53157227) and next prime (53157253).

It is a congruent number.

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, 53145 + ... + 54135.

It is an arithmetic number, because the mean of its divisors is an integer number (1813500).

Almost surely, 2^53157240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53157240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87048000).

53157240 is an abundant number, since it is smaller than the sum of its proper divisors (120938760).

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

53157240 is a wasteful number, since it uses less digits than its factorization.

53157240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 53157240 is about 7290.9011788667. The cubic root of 53157240 is about 375.9996793418. Note that the first 3 decimals are identical.

The spelling of 53157240 in words is "fifty-three million, one hundred fifty-seven thousand, two hundred forty".