2278139522 has 8 divisors (see below), whose sum is σ = 3420963072. Its totient is φ = 1137818500.

The previous prime is 2278139483. The next prime is 2278139531. The reversal of 2278139522 is 2259318722.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2278139522.

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, 623354 + ... + 626997.

It is an arithmetic number, because the mean of its divisors is an integer number (427620384).

Almost surely, 2^2278139522 is an apocalyptic number.

2278139522 is a deficient number, since it is larger than the sum of its proper divisors (1142823550).

2278139522 is a wasteful number, since it uses less digits than its factorization.

2278139522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251264.

The product of its digits is 120960, while the sum is 41.

The square root of 2278139522 is about 47729.8598573262. The cubic root of 2278139522 is about 1315.8107780803.

The spelling of 2278139522 in words is "two billion, two hundred seventy-eight million, one hundred thirty-nine thousand, five hundred twenty-two".