2540951813 has 4 divisors (see below), whose sum is σ = 2573115840. Its totient is φ = 2508787788.

The previous prime is 2540951759. The next prime is 2540951827. The reversal of 2540951813 is 3181590452.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2540951813 - 2⁸ = 2540951557 is a prime.

It is a super-2 number, since 2×2540951813² = 12912872231975973938, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540951843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16081895 + ... + 16082052.

It is an arithmetic number, because the mean of its divisors is an integer number (643278960).

Almost surely, 2^2540951813 is an apocalyptic number.

It is an amenable number.

2540951813 is a deficient number, since it is larger than the sum of its proper divisors (32164027).

2540951813 is an equidigital number, since it uses as much as digits as its factorization.

2540951813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32164026.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 2540951813 is about 50407.8546756356. The cubic root of 2540951813 is about 1364.5793965909.

The spelling of 2540951813 in words is "two billion, five hundred forty million, nine hundred fifty-one thousand, eight hundred thirteen".