2551751905 has 16 divisors (see below), whose sum is σ = 3305422080. Its totient is φ = 1885309888.

The previous prime is 2551751899. The next prime is 2551751941. The reversal of 2551751905 is 5091571552.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2551751905 - 2¹¹ = 2551749857 is a prime.

It is a super-2 number, since 2×2551751905² = 13022875569342258050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379237 + ... + 385906.

It is an arithmetic number, because the mean of its divisors is an integer number (206588880).

Almost surely, 2^2551751905 is an apocalyptic number.

It is an amenable number.

2551751905 is a deficient number, since it is larger than the sum of its proper divisors (753670175).

2551751905 is a wasteful number, since it uses less digits than its factorization.

2551751905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765200.

The product of its (nonzero) digits is 78750, while the sum is 40.

The square root of 2551751905 is about 50514.8681578008. The cubic root of 2551751905 is about 1366.5100054083.

The spelling of 2551751905 in words is "two billion, five hundred fifty-one million, seven hundred fifty-one thousand, nine hundred five".