2521540724 has 6 divisors (see below), whose sum is σ = 4412696274. Its totient is φ = 1260770360.

The previous prime is 2521540717. The next prime is 2521540727. The reversal of 2521540724 is 4270451252.

It can be written as a sum of positive squares in only one way, i.e., 1315367824 + 1206172900 = 36268^2 + 34730^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521540727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315192587 + ... + 315192594.

It is an arithmetic number, because the mean of its divisors is an integer number (735449379).

Almost surely, 2^2521540724 is an apocalyptic number.

It is an amenable number.

2521540724 is a deficient number, since it is larger than the sum of its proper divisors (1891155550).

2521540724 is a wasteful number, since it uses less digits than its factorization.

2521540724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630385185 (or 630385183 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 32.

The square root of 2521540724 is about 50214.9452255003. The cubic root of 2521540724 is about 1361.0957007640.

Adding to 2521540724 its reverse (4270451252), we get a palindrome (6791991976).

The spelling of 2521540724 in words is "two billion, five hundred twenty-one million, five hundred forty thousand, seven hundred twenty-four".