1315777553 has 2 divisors, whose sum is σ = 1315777554. Its totient is φ = 1315777552.

The previous prime is 1315777499. The next prime is 1315777559. The reversal of 1315777553 is 3557775131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1246937344 + 68840209 = 35312^2 + 8297^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315777553 - 2⁸ = 1315777297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1315777559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657888776 + 657888777.

It is an arithmetic number, because the mean of its divisors is an integer number (657888777).

Almost surely, 2^1315777553 is an apocalyptic number.

It is an amenable number.

1315777553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315777553 is an equidigital number, since it uses as much as digits as its factorization.

1315777553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 385875, while the sum is 44.

The square root of 1315777553 is about 36273.6481898361. The cubic root of 1315777553 is about 1095.7903992175.

The spelling of 1315777553 in words is "one billion, three hundred fifteen million, seven hundred seventy-seven thousand, five hundred fifty-three".