2553515491 has 2 divisors, whose sum is σ = 2553515492. Its totient is φ = 2553515490.

The previous prime is 2553515441. The next prime is 2553515519. The reversal of 2553515491 is 1945153552.

2553515491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2553515491 - 2⁹ = 2553514979 is a prime.

It is not a weakly prime, because it can be changed into another prime (2553515441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276757745 + 1276757746.

It is an arithmetic number, because the mean of its divisors is an integer number (1276757746).

Almost surely, 2^2553515491 is an apocalyptic number.

2553515491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2553515491 is an equidigital number, since it uses as much as digits as its factorization.

2553515491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135000, while the sum is 40.

The square root of 2553515491 is about 50532.3212508588. The cubic root of 2553515491 is about 1366.8247438078.

The spelling of 2553515491 in words is "two billion, five hundred fifty-three million, five hundred fifteen thousand, four hundred ninety-one".