2051225904 has 320 divisors, whose sum is σ = 6814674944. Its totient is φ = 517321728.

The previous prime is 2051225851. The next prime is 2051225909. The reversal of 2051225904 is 4095221502.

It is not an unprimeable number, because it can be changed into a prime (2051225909) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12584127 + ... + 12584289.

Almost surely, 2^2051225904 is an apocalyptic number.

2051225904 is a gapful number since it is divisible by the number (24) 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 2051225904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3407337472).

2051225904 is an abundant number, since it is smaller than the sum of its proper divisors (4763449040).

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

2051225904 is a wasteful number, since it uses less digits than its factorization.

2051225904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2051225904 is about 45290.4615123317. The cubic root of 2051225904 is about 1270.5872630691.

The spelling of 2051225904 in words is "two billion, fifty-one million, two hundred twenty-five thousand, nine hundred four".