53140237 has 4 divisors (see below), whose sum is σ = 53447580. Its totient is φ = 52832896.

The previous prime is 53140193. The next prime is 53140253. The reversal of 53140237 is 73204135.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25462116 + 27678121 = 5046^2 + 5261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53140237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53140337) 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, 153412 + ... + 153757.

It is an arithmetic number, because the mean of its divisors is an integer number (13361895).

Almost surely, 2^53140237 is an apocalyptic number.

It is an amenable number.

53140237 is a deficient number, since it is larger than the sum of its proper divisors (307343).

53140237 is a wasteful number, since it uses less digits than its factorization.

53140237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307342.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 53140237 is about 7289.7350431960. The cubic root of 53140237 is about 375.9595856857.

The spelling of 53140237 in words is "fifty-three million, one hundred forty thousand, two hundred thirty-seven".