2551749929 has 4 divisors (see below), whose sum is σ = 2701852884. Its totient is φ = 2401646976.

The previous prime is 2551749911. The next prime is 2551749931. The reversal of 2551749929 is 9299471552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1188663529 + 1363086400 = 34477^2 + 36920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2551749929 is a prime.

It is a super-2 number, since 2×2551749929² = 13022855400303010082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2551749979) 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 3 ways as a sum of consecutive naturals, for example, 75051452 + ... + 75051485.

It is an arithmetic number, because the mean of its divisors is an integer number (675463221).

Almost surely, 2^2551749929 is an apocalyptic number.

It is an amenable number.

2551749929 is a deficient number, since it is larger than the sum of its proper divisors (150102955).

2551749929 is a wasteful number, since it uses less digits than its factorization.

2551749929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150102954.

The product of its digits is 2041200, while the sum is 53.

The square root of 2551749929 is about 50514.8485991990. The cubic root of 2551749929 is about 1366.5096526801.

The spelling of 2551749929 in words is "two billion, five hundred fifty-one million, seven hundred forty-nine thousand, nine hundred twenty-nine".