2115244451 has 4 divisors (see below), whose sum is σ = 2115357600. Its totient is φ = 2115131304.

The previous prime is 2115244409. The next prime is 2115244463. The reversal of 2115244451 is 1544425112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2115244451 - 2⁶ = 2115244387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115244051) 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, 21131 + ... + 68388.

It is an arithmetic number, because the mean of its divisors is an integer number (528839400).

Almost surely, 2^2115244451 is an apocalyptic number.

2115244451 is a deficient number, since it is larger than the sum of its proper divisors (113149).

2115244451 is an equidigital number, since it uses as much as digits as its factorization.

2115244451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113148.

The product of its digits is 6400, while the sum is 29.

The square root of 2115244451 is about 45991.7867776411. The cubic root of 2115244451 is about 1283.6703837405.

Adding to 2115244451 its reverse (1544425112), we get a palindrome (3659669563).

The spelling of 2115244451 in words is "two billion, one hundred fifteen million, two hundred forty-four thousand, four hundred fifty-one".