2156520250 has 64 divisors (see below), whose sum is σ = 4251087360. Its totient is φ = 817555200.

The previous prime is 2156520211. The next prime is 2156520271. The reversal of 2156520250 is 520256512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 648091 + ... + 651409.

It is an arithmetic number, because the mean of its divisors is an integer number (66423240).

Almost surely, 2^2156520250 is an apocalyptic number.

2156520250 is a deficient number, since it is larger than the sum of its proper divisors (2094567110).

2156520250 is a wasteful number, since it uses less digits than its factorization.

2156520250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3472 (or 3462 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2156520250 is about 46438.3489155245. The cubic root of 2156520250 is about 1291.9662840617.

Adding to 2156520250 its reverse (520256512), we get a palindrome (2676776762).

The spelling of 2156520250 in words is "two billion, one hundred fifty-six million, five hundred twenty thousand, two hundred fifty".