2051391884 has 24 divisors (see below), whose sum is σ = 3702386688. Its totient is φ = 993943440.

The previous prime is 2051391877. The next prime is 2051391899. The reversal of 2051391884 is 4881931502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25112 + ... + 68799.

It is an arithmetic number, because the mean of its divisors is an integer number (154266112).

Almost surely, 2^2051391884 is an apocalyptic number.

It is an amenable number.

2051391884 is a deficient number, since it is larger than the sum of its proper divisors (1650994804).

2051391884 is a wasteful number, since it uses less digits than its factorization.

2051391884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94085 (or 94083 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 2051391884 is about 45292.2938699289. The cubic root of 2051391884 is about 1270.6215330449.

The spelling of 2051391884 in words is "two billion, fifty-one million, three hundred ninety-one thousand, eight hundred eighty-four".