2440697251 has 4 divisors (see below), whose sum is σ = 2441470600. Its totient is φ = 2439923904.

The previous prime is 2440697249. The next prime is 2440697261. The reversal of 2440697251 is 1527960442.

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 2440697251 - 2¹ = 2440697249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2440697261) 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, 381921 + ... + 388258.

It is an arithmetic number, because the mean of its divisors is an integer number (610367650).

Almost surely, 2^2440697251 is an apocalyptic number.

2440697251 is a deficient number, since it is larger than the sum of its proper divisors (773349).

2440697251 is an equidigital number, since it uses as much as digits as its factorization.

2440697251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773348.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 2440697251 is about 49403.4133537350. The cubic root of 2440697251 is about 1346.3913226627.

The spelling of 2440697251 in words is "two billion, four hundred forty million, six hundred ninety-seven thousand, two hundred fifty-one".