2278372521 has 16 divisors (see below), whose sum is σ = 3223165824. Its totient is φ = 1426616064.

The previous prime is 2278372519. The next prime is 2278372529. The reversal of 2278372521 is 1252738722.

2278372521 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2278372521 - 2¹ = 2278372519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2278372521.

It is not an unprimeable number, because it can be changed into a prime (2278372529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21030 + ... + 70703.

It is an arithmetic number, because the mean of its divisors is an integer number (201447864).

Almost surely, 2^2278372521 is an apocalyptic number.

It is an amenable number.

2278372521 is a deficient number, since it is larger than the sum of its proper divisors (944793303).

2278372521 is a wasteful number, since it uses less digits than its factorization.

2278372521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92240.

The product of its digits is 94080, while the sum is 39.

The square root of 2278372521 is about 47732.3006045173. The cubic root of 2278372521 is about 1315.8556351725.

The spelling of 2278372521 in words is "two billion, two hundred seventy-eight million, three hundred seventy-two thousand, five hundred twenty-one".