2051149881 has 16 divisors (see below), whose sum is σ = 2984249088. Its totient is φ = 1242805200.

The previous prime is 2051149853. The next prime is 2051149957. The reversal of 2051149881 is 1889411502.

It is not a de Polignac number, because 2051149881 - 2⁶ = 2051149817 is a prime.

It is a super-2 number, since 2×2051149881² = 8414431668652628322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2051149801) 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, 240370 + ... + 248756.

It is an arithmetic number, because the mean of its divisors is an integer number (186515568).

Almost surely, 2^2051149881 is an apocalyptic number.

It is an amenable number.

2051149881 is a deficient number, since it is larger than the sum of its proper divisors (933099207).

2051149881 is a wasteful number, since it uses less digits than its factorization.

2051149881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15812.

The product of its (nonzero) digits is 23040, while the sum is 39.

The square root of 2051149881 is about 45289.6222218733. The cubic root of 2051149881 is about 1270.5715659440.

The spelling of 2051149881 in words is "two billion, fifty-one million, one hundred forty-nine thousand, eight hundred eighty-one".