75257513 has 4 divisors (see below), whose sum is σ = 75535488. Its totient is φ = 74979540.

The previous prime is 75257503. The next prime is 75257527. The reversal of 75257513 is 31575257.

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 a de Polignac number, because none of the positive numbers 2^k-75257513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75257503) 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, 138581 + ... + 139122.

It is an arithmetic number, because the mean of its divisors is an integer number (18883872).

Almost surely, 2^75257513 is an apocalyptic number.

It is an amenable number.

75257513 is a deficient number, since it is larger than the sum of its proper divisors (277975).

75257513 is a wasteful number, since it uses less digits than its factorization.

75257513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277974.

The product of its digits is 36750, while the sum is 35.

The square root of 75257513 is about 8675.1088177613. The cubic root of 75257513 is about 422.1984365820.

The spelling of 75257513 in words is "seventy-five million, two hundred fifty-seven thousand, five hundred thirteen".