2515531240 has 32 divisors (see below), whose sum is σ = 5697945000. Its totient is φ = 999457024.

The previous prime is 2515531223. The next prime is 2515531243. The reversal of 2515531240 is 421355152.

It can be written as a sum of positive squares in 4 ways, for example, as 706390084 + 1809141156 = 26578^2 + 42534^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2515531199 and 2515531208.

It is not an unprimeable number, because it can be changed into a prime (2515531243) 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, 205075 + ... + 216994.

Almost surely, 2^2515531240 is an apocalyptic number.

2515531240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2515531240 is an abundant number, since it is smaller than the sum of its proper divisors (3182413760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2515531240 is a wasteful number, since it uses less digits than its factorization.

2515531240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422229 (or 422225 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2515531240 is about 50155.0719269746. The cubic root of 2515531240 is about 1360.0135595534.

Adding to 2515531240 its reverse (421355152), we get a palindrome (2936886392).

The spelling of 2515531240 in words is "two billion, five hundred fifteen million, five hundred thirty-one thousand, two hundred forty".