75205513 has 4 divisors (see below), whose sum is σ = 75328020. Its totient is φ = 75083008.

The previous prime is 75205511. The next prime is 75205519. The reversal of 75205513 is 31550257.

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 1468944 + 73736569 = 1212^2 + 8587^2 .

It is a cyclic number.

It is not a de Polignac number, because 75205513 - 2¹ = 75205511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75205511) 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, 60328 + ... + 61561.

It is an arithmetic number, because the mean of its divisors is an integer number (18832005).

Almost surely, 2^75205513 is an apocalyptic number.

It is an amenable number.

75205513 is a deficient number, since it is larger than the sum of its proper divisors (122507).

75205513 is a wasteful number, since it uses less digits than its factorization.

75205513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122506.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 75205513 is about 8672.1112193053. Note that the first 3 decimals coincide. The cubic root of 75205513 is about 422.1011733042.

The spelling of 75205513 in words is "seventy-five million, two hundred five thousand, five hundred thirteen".