2557403297 has 2 divisors, whose sum is σ = 2557403298. Its totient is φ = 2557403296.

The previous prime is 2557403267. The next prime is 2557403389. The reversal of 2557403297 is 7923047552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2119589521 + 437813776 = 46039^2 + 20924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2557403297 is a prime.

It is not a weakly prime, because it can be changed into another prime (2557403237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278701648 + 1278701649.

It is an arithmetic number, because the mean of its divisors is an integer number (1278701649).

Almost surely, 2^2557403297 is an apocalyptic number.

It is an amenable number.

2557403297 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557403297 is an equidigital number, since it uses as much as digits as its factorization.

2557403297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 44.

The square root of 2557403297 is about 50570.7751275378. The cubic root of 2557403297 is about 1367.5180696500.

The spelling of 2557403297 in words is "two billion, five hundred fifty-seven million, four hundred three thousand, two hundred ninety-seven".