2123240757 has 32 divisors (see below), whose sum is σ = 3131842560. Its totient is φ = 1268809920.

The previous prime is 2123240753. The next prime is 2123240759. The reversal of 2123240757 is 7570423212.

It is not a de Polignac number, because 2123240757 - 2² = 2123240753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123240753) 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 31 ways as a sum of consecutive naturals, for example, 800808 + ... + 803454.

It is an arithmetic number, because the mean of its divisors is an integer number (97870080).

Almost surely, 2^2123240757 is an apocalyptic number.

It is an amenable number.

2123240757 is a deficient number, since it is larger than the sum of its proper divisors (1008601803).

2123240757 is a wasteful number, since it uses less digits than its factorization.

2123240757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 2123240757 is about 46078.6366660300. The cubic root of 2123240757 is about 1285.2859123472.

Adding to 2123240757 its reverse (7570423212), we get a palindrome (9693663969).

The spelling of 2123240757 in words is "two billion, one hundred twenty-three million, two hundred forty thousand, seven hundred fifty-seven".