2421975816 has 160 divisors (see below), whose sum is σ = 7376624640. Its totient is φ = 737983872.

The previous prime is 2421975799. The next prime is 2421975833. The reversal of 2421975816 is 6185791242.

It is an interprime number because it is at equal distance from previous prime (2421975799) and next prime (2421975833).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 900025 + ... + 902711.

It is an arithmetic number, because the mean of its divisors is an integer number (46103904).

Almost surely, 2^2421975816 is an apocalyptic number.

2421975816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2421975816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3688312320).

2421975816 is an abundant number, since it is smaller than the sum of its proper divisors (4954648824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2421975816 is a wasteful number, since it uses less digits than its factorization.

2421975816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825 (or 2812 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 2421975816 is about 49213.5734934987. The cubic root of 2421975816 is about 1342.9399725191.

The spelling of 2421975816 in words is "two billion, four hundred twenty-one million, nine hundred seventy-five thousand, eight hundred sixteen".