2123424651 has 4 divisors (see below), whose sum is σ = 2831232872. Its totient is φ = 1415616432.

The previous prime is 2123424643. The next prime is 2123424671. The reversal of 2123424651 is 1564243212.

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

It is not a de Polignac number, because 2123424651 - 2³ = 2123424643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123424601) 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, 353904106 + ... + 353904111.

It is an arithmetic number, because the mean of its divisors is an integer number (707808218).

Almost surely, 2^2123424651 is an apocalyptic number.

2123424651 is a deficient number, since it is larger than the sum of its proper divisors (707808221).

2123424651 is an equidigital number, since it uses as much as digits as its factorization.

2123424651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707808220.

The product of its digits is 11520, while the sum is 30.

The square root of 2123424651 is about 46080.6320594672. The cubic root of 2123424651 is about 1285.3230175041.

Adding to 2123424651 its reverse (1564243212), we get a palindrome (3687667863).

The spelling of 2123424651 in words is "two billion, one hundred twenty-three million, four hundred twenty-four thousand, six hundred fifty-one".