4000000251 has 32 divisors (see below), whose sum is σ = 6051709440. Its totient is φ = 2329737984.

The previous prime is 4000000241. The next prime is 4000000273. The reversal of 4000000251 is 1520000004.

It is not a de Polignac number, because 4000000251 - 2⁶ = 4000000187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4000000231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1059970 + ... + 1063736.

It is an arithmetic number, because the mean of its divisors is an integer number (189115920).

Almost surely, 2^4000000251 is an apocalyptic number.

4000000251 is a deficient number, since it is larger than the sum of its proper divisors (2051709189).

4000000251 is a wasteful number, since it uses less digits than its factorization.

4000000251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5235.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 4000000251 is about 63245.5551876968. Note that the first 3 decimals coincide. The cubic root of 4000000251 is about 1587.4010851713.

Adding to 4000000251 its reverse (1520000004), we get a palindrome (5520000255).

The spelling of 4000000251 in words is "four billion, two hundred fifty-one", and thus it is an aban number.