2521043738 has 16 divisors (see below), whose sum is σ = 3807513216. Its totient is φ = 1251884160.

The previous prime is 2521043737. The next prime is 2521043741. The reversal of 2521043738 is 8373401252.

It is a junction number, because it is equal to n+sod(n) for n = 2521043698 and 2521043707.

It is not an unprimeable number, because it can be changed into a prime (2521043737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 827498 + ... + 830538.

It is an arithmetic number, because the mean of its divisors is an integer number (237969576).

Almost surely, 2^2521043738 is an apocalyptic number.

2521043738 is a deficient number, since it is larger than the sum of its proper divisors (1286469478).

2521043738 is a wasteful number, since it uses less digits than its factorization.

2521043738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5749.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 2521043738 is about 50209.9963951403. The cubic root of 2521043738 is about 1361.0062726420.

The spelling of 2521043738 in words is "two billion, five hundred twenty-one million, forty-three thousand, seven hundred thirty-eight".