2152931878 has 8 divisors (see below), whose sum is σ = 3262690872. Its totient is φ = 1065368256.

The previous prime is 2152931849. The next prime is 2152931881. The reversal of 2152931878 is 8781392512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5548600 + ... + 5548987.

It is an arithmetic number, because the mean of its divisors is an integer number (407836359).

Almost surely, 2^2152931878 is an apocalyptic number.

2152931878 is a deficient number, since it is larger than the sum of its proper divisors (1109758994).

2152931878 is a wasteful number, since it uses less digits than its factorization.

2152931878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11097686.

The product of its digits is 241920, while the sum is 46.

The square root of 2152931878 is about 46399.6969602173. The cubic root of 2152931878 is about 1291.2492911147.

The spelling of 2152931878 in words is "two billion, one hundred fifty-two million, nine hundred thirty-one thousand, eight hundred seventy-eight".