5161075921 has 4 divisors (see below), whose sum is σ = 5161615600. Its totient is φ = 5160536244.

The previous prime is 5161075897. The next prime is 5161075937. The reversal of 5161075921 is 1295701615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5161075921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5161075321) 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, 255231 + ... + 274708.

It is an arithmetic number, because the mean of its divisors is an integer number (1290403900).

Almost surely, 2^5161075921 is an apocalyptic number.

It is an amenable number.

5161075921 is a deficient number, since it is larger than the sum of its proper divisors (539679).

5161075921 is an equidigital number, since it uses as much as digits as its factorization.

5161075921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539678.

The product of its (nonzero) digits is 18900, while the sum is 37.

The square root of 5161075921 is about 71840.6286233633. The cubic root of 5161075921 is about 1728.1446157091.

The spelling of 5161075921 in words is "five billion, one hundred sixty-one million, seventy-five thousand, nine hundred twenty-one".