75113557 has 4 divisors (see below), whose sum is σ = 75292396. Its totient is φ = 74934720.

The previous prime is 75113551. The next prime is 75113573. The reversal of 75113557 is 75531157.

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 1136356 + 73977201 = 1066^2 + 8601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75113557 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 (75113551) 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, 88788 + ... + 89629.

It is an arithmetic number, because the mean of its divisors is an integer number (18823099).

Almost surely, 2^75113557 is an apocalyptic number.

It is an amenable number.

75113557 is a deficient number, since it is larger than the sum of its proper divisors (178839).

75113557 is a wasteful number, since it uses less digits than its factorization.

75113557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178838.

The product of its digits is 18375, while the sum is 34.

The square root of 75113557 is about 8666.8077744923. The cubic root of 75113557 is about 421.9290646176.

The spelling of 75113557 in words is "seventy-five million, one hundred thirteen thousand, five hundred fifty-seven".