2521222738 has 4 divisors (see below), whose sum is σ = 3781834110. Its totient is φ = 1260611368.

The previous prime is 2521222673. The next prime is 2521222771. The reversal of 2521222738 is 8372221252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1868573529 + 652649209 = 43227^2 + 25547^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630305683 + ... + 630305686.

Almost surely, 2^2521222738 is an apocalyptic number.

2521222738 is a deficient number, since it is larger than the sum of its proper divisors (1260611372).

2521222738 is a wasteful number, since it uses less digits than its factorization.

2521222738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260611371.

The product of its digits is 26880, while the sum is 34.

The square root of 2521222738 is about 50211.7788770723. The cubic root of 2521222738 is about 1361.0384834222.

The spelling of 2521222738 in words is "two billion, five hundred twenty-one million, two hundred twenty-two thousand, seven hundred thirty-eight".