75216455 has 4 divisors (see below), whose sum is σ = 90259752. Its totient is φ = 60173160.

The previous prime is 75216451. The next prime is 75216469. The reversal of 75216455 is 55461257.

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

It is not a de Polignac number, because 75216455 - 2² = 75216451 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 (75216451) 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, 7521641 + ... + 7521650.

It is an arithmetic number, because the mean of its divisors is an integer number (22564938).

Almost surely, 2^75216455 is an apocalyptic number.

75216455 is a deficient number, since it is larger than the sum of its proper divisors (15043297).

75216455 is a wasteful number, since it uses less digits than its factorization.

75216455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15043296.

The product of its digits is 42000, while the sum is 35.

The square root of 75216455 is about 8672.7420692651. The cubic root of 75216455 is about 422.1216434661.

The spelling of 75216455 in words is "seventy-five million, two hundred sixteen thousand, four hundred fifty-five".