2540039501 has 6 divisors (see below), whose sum is σ = 2630648202. Its totient is φ = 2452451120.

The previous prime is 2540039483. The next prime is 2540039527. The reversal of 2540039501 is 1059300452.

It can be written as a sum of positive squares in 3 ways, for example, as 647702500 + 1892337001 = 25450^2 + 43501^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2540039501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540039401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1509290 + ... + 1510971.

It is an arithmetic number, because the mean of its divisors is an integer number (438441367).

Almost surely, 2^2540039501 is an apocalyptic number.

It is an amenable number.

2540039501 is a deficient number, since it is larger than the sum of its proper divisors (90608701).

2540039501 is an equidigital number, since it uses as much as digits as its factorization.

2540039501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3020319 (or 3020290 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 2540039501 is about 50398.8045592353. The cubic root of 2540039501 is about 1364.4160626287.

Adding to 2540039501 its reverse (1059300452), we get a palindrome (3599339953).

The spelling of 2540039501 in words is "two billion, five hundred forty million, thirty-nine thousand, five hundred one".