75210055 has 4 divisors (see below), whose sum is σ = 90252072. Its totient is φ = 60168040.

The previous prime is 75210049. The next prime is 75210059. The reversal of 75210055 is 55001257.

It is a happy number.

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

It is not a de Polignac number, because 75210055 - 2²⁵ = 41655623 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 (75210059) 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, 7521001 + ... + 7521010.

It is an arithmetic number, because the mean of its divisors is an integer number (22563018).

Almost surely, 2^75210055 is an apocalyptic number.

75210055 is a deficient number, since it is larger than the sum of its proper divisors (15042017).

75210055 is a wasteful number, since it uses less digits than its factorization.

75210055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15042016.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 75210055 is about 8672.3730892991. The cubic root of 75210055 is about 422.1096706642.

The spelling of 75210055 in words is "seventy-five million, two hundred ten thousand, fifty-five".