2551749930 has 48 divisors (see below), whose sum is σ = 6640526880. Its totient is φ = 679853664.

The previous prime is 2551749911. The next prime is 2551749931. The reversal of 2551749930 is 399471552.

It is a happy number.

2551749930 is a `hidden beast` number, since 2 + 5 + 517 + 49 + 93 + 0 = 666.

It is a super-2 number, since 2×2551749930² = 13022855410510009800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2551749931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92481 + ... + 116859.

It is an arithmetic number, because the mean of its divisors is an integer number (138344310).

Almost surely, 2^2551749930 is an apocalyptic number.

2551749930 is an abundant number, since it is smaller than the sum of its proper divisors (4088776950).

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

2551749930 is a wasteful number, since it uses less digits than its factorization.

2551749930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25555 (or 25552 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 2551749930 is about 50514.8486090971. The cubic root of 2551749930 is about 1366.5096528586.

The spelling of 2551749930 in words is "two billion, five hundred fifty-one million, seven hundred forty-nine thousand, nine hundred thirty".