2126501551 has 2 divisors, whose sum is σ = 2126501552. Its totient is φ = 2126501550.

The previous prime is 2126501521. The next prime is 2126501561. The reversal of 2126501551 is 1551056212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2126501551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2126501521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063250775 + 1063250776.

It is an arithmetic number, because the mean of its divisors is an integer number (1063250776).

Almost surely, 2^2126501551 is an apocalyptic number.

2126501551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126501551 is an equidigital number, since it uses as much as digits as its factorization.

2126501551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 2126501551 is about 46114.0060176949. The cubic root of 2126501551 is about 1285.9435405379.

Adding to 2126501551 its reverse (1551056212), we get a palindrome (3677557763).

The spelling of 2126501551 in words is "two billion, one hundred twenty-six million, five hundred one thousand, five hundred fifty-one".