2123513451 has 12 divisors (see below), whose sum is σ = 3142109880. Its totient is φ = 1381146720.

The previous prime is 2123513449. The next prime is 2123513459. The reversal of 2123513451 is 1543153212.

It is not a de Polignac number, because 2123513451 - 2¹ = 2123513449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2123513459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2877021 + ... + 2877758.

It is an arithmetic number, because the mean of its divisors is an integer number (261842490).

Almost surely, 2^2123513451 is an apocalyptic number.

2123513451 is a deficient number, since it is larger than the sum of its proper divisors (1018596429).

2123513451 is a wasteful number, since it uses less digits than its factorization.

2123513451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5754826 (or 5754823 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 2123513451 is about 46081.5955778443. The cubic root of 2123513451 is about 1285.3409343305.

Adding to 2123513451 its reverse (1543153212), we get a palindrome (3666666663).

The spelling of 2123513451 in words is "two billion, one hundred twenty-three million, five hundred thirteen thousand, four hundred fifty-one".