53012509 has 4 divisors (see below), whose sum is σ = 57831840. Its totient is φ = 48193180.

The previous prime is 53012501. The next prime is 53012513. The reversal of 53012509 is 90521035.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53012509 - 2³ = 53012501 is a prime.

It is a super-2 number, since 2×53012509² = 5620652220950162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53012501) 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, 2409649 + ... + 2409670.

It is an arithmetic number, because the mean of its divisors is an integer number (14457960).

Almost surely, 2^53012509 is an apocalyptic number.

It is an amenable number.

53012509 is a deficient number, since it is larger than the sum of its proper divisors (4819331).

53012509 is a wasteful number, since it uses less digits than its factorization.

53012509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4819330.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 53012509 is about 7280.9689602415. The cubic root of 53012509 is about 375.6581249079.

The spelling of 53012509 in words is "fifty-three million, twelve thousand, five hundred nine".