2540630251 has 4 divisors (see below), whose sum is σ = 2546365752. Its totient is φ = 2534894752.

The previous prime is 2540630227. The next prime is 2540630269. The reversal of 2540630251 is 1520360452.

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

It is a cyclic number.

It is not a de Polignac number, because 2540630251 - 2¹³ = 2540622059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540630291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2867086 + ... + 2867971.

It is an arithmetic number, because the mean of its divisors is an integer number (636591438).

Almost surely, 2^2540630251 is an apocalyptic number.

2540630251 is a deficient number, since it is larger than the sum of its proper divisors (5735501).

2540630251 is an equidigital number, since it uses as much as digits as its factorization.

2540630251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5735500.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2540630251 is about 50404.6649725995. The cubic root of 2540630251 is about 1364.5218308408.

The spelling of 2540630251 in words is "two billion, five hundred forty million, six hundred thirty thousand, two hundred fifty-one".