2125453991 has 2 divisors, whose sum is σ = 2125453992. Its totient is φ = 2125453990.

The previous prime is 2125453969. The next prime is 2125453997. The reversal of 2125453991 is 1993545212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2125453991 - 2¹⁴ = 2125437607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125453997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062726995 + 1062726996.

It is an arithmetic number, because the mean of its divisors is an integer number (1062726996).

Almost surely, 2^2125453991 is an apocalyptic number.

2125453991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125453991 is an equidigital number, since it uses as much as digits as its factorization.

2125453991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The square root of 2125453991 is about 46102.6462472600. The cubic root of 2125453991 is about 1285.7323447863.

The spelling of 2125453991 in words is "two billion, one hundred twenty-five million, four hundred fifty-three thousand, nine hundred ninety-one".