2551097381 has 16 divisors (see below), whose sum is σ = 2955880704. Its totient is φ = 2156557824.

The previous prime is 2551097369. The next prime is 2551097411. The reversal of 2551097381 is 1837901552.

It is a cyclic number.

It is not a de Polignac number, because 2551097381 - 2¹⁰ = 2551096357 is a prime.

It is a super-2 number, since 2×2551097381² = 13016195694690118322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551097321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192536 + ... + 205358.

It is an arithmetic number, because the mean of its divisors is an integer number (184742544).

Almost surely, 2^2551097381 is an apocalyptic number.

It is an amenable number.

2551097381 is a deficient number, since it is larger than the sum of its proper divisors (404783323).

2551097381 is a wasteful number, since it uses less digits than its factorization.

2551097381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13220.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 2551097381 is about 50508.3892140702. The cubic root of 2551097381 is about 1366.3931588768.

The spelling of 2551097381 in words is "two billion, five hundred fifty-one million, ninety-seven thousand, three hundred eighty-one".