2152500078 has 32 divisors (see below), whose sum is σ = 4409395200. Its totient is φ = 700189920.

The previous prime is 2152500073. The next prime is 2152500109. The reversal of 2152500078 is 8700052512.

2152500078 is a nontrivial binomial coefficient, being equal to C(65613, 2).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152500073) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 87483 + ... + 109353.

It is an arithmetic number, because the mean of its divisors is an integer number (137793600).

Almost surely, 2^2152500078 is an apocalyptic number.

2152500078 is the 65612-nd triangular number.

2152500078 is an abundant number, since it is smaller than the sum of its proper divisors (2256895122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2152500078 is a wasteful number, since it uses less digits than its factorization.

2152500078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22272.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 2152500078 is about 46395.0436792552. The cubic root of 2152500078 is about 1291.1629594276.

The spelling of 2152500078 in words is "two billion, one hundred fifty-two million, five hundred thousand, seventy-eight".