75515151 has 4 divisors (see below), whose sum is σ = 100686872. Its totient is φ = 50343432.

The previous prime is 75515119. The next prime is 75515161. The reversal of 75515151 is 15151557.

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

It is not a de Polignac number, because 75515151 - 2⁵ = 75515119 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 (75515161) 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, 12585856 + ... + 12585861.

It is an arithmetic number, because the mean of its divisors is an integer number (25171718).

Almost surely, 2^75515151 is an apocalyptic number.

75515151 is a deficient number, since it is larger than the sum of its proper divisors (25171721).

75515151 is a wasteful number, since it uses less digits than its factorization.

75515151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25171720.

The product of its digits is 4375, while the sum is 30.

The square root of 75515151 is about 8689.9453968365. The cubic root of 75515151 is about 422.6796752219.

The spelling of 75515151 in words is "seventy-five million, five hundred fifteen thousand, one hundred fifty-one".