2915423921 has 4 divisors (see below), whose sum is σ = 2916166512. Its totient is φ = 2914681332.

The previous prime is 2915423899. The next prime is 2915423933. The reversal of 2915423921 is 1293245192.

It is a happy number.

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-2915423921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2915323921) 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, 365375 + ... + 373268.

It is an arithmetic number, because the mean of its divisors is an integer number (729041628).

Almost surely, 2^2915423921 is an apocalyptic number.

It is an amenable number.

2915423921 is a deficient number, since it is larger than the sum of its proper divisors (742591).

2915423921 is an equidigital number, since it uses as much as digits as its factorization.

2915423921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742590.

The product of its digits is 38880, while the sum is 38.

The square root of 2915423921 is about 53994.6656717124. The cubic root of 2915423921 is about 1428.5668594630.

The spelling of 2915423921 in words is "two billion, nine hundred fifteen million, four hundred twenty-three thousand, nine hundred twenty-one".