1557015253 has 2 divisors, whose sum is σ = 1557015254. Its totient is φ = 1557015252.

The previous prime is 1557015247. The next prime is 1557015289. The reversal of 1557015253 is 3525107551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1389649284 + 167365969 = 37278^2 + 12937^2 .

It is a cyclic number.

It is not a de Polignac number, because 1557015253 - 2¹³ = 1557007061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1557015223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778507626 + 778507627.

It is an arithmetic number, because the mean of its divisors is an integer number (778507627).

Almost surely, 2^1557015253 is an apocalyptic number.

It is an amenable number.

1557015253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1557015253 is an equidigital number, since it uses as much as digits as its factorization.

1557015253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26250, while the sum is 34.

The square root of 1557015253 is about 39459.0325907770. The cubic root of 1557015253 is about 1159.0378597916.

The spelling of 1557015253 in words is "one billion, five hundred fifty-seven million, fifteen thousand, two hundred fifty-three".