1557033953 has 2 divisors, whose sum is σ = 1557033954. Its totient is φ = 1557033952.

The previous prime is 1557033871. The next prime is 1557033979. The reversal of 1557033953 is 3593307551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1556144704 + 889249 = 39448^2 + 943^2 .

It is a cyclic number.

It is not a de Polignac number, because 1557033953 - 2¹² = 1557029857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1557033953.

It is not a weakly prime, because it can be changed into another prime (1557033253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778516976 + 778516977.

It is an arithmetic number, because the mean of its divisors is an integer number (778516977).

Almost surely, 2^1557033953 is an apocalyptic number.

It is an amenable number.

1557033953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1557033953 is an equidigital number, since it uses as much as digits as its factorization.

1557033953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 212625, while the sum is 41.

The square root of 1557033953 is about 39459.2695446837. The cubic root of 1557033953 is about 1159.0424998492.

The spelling of 1557033953 in words is "one billion, five hundred fifty-seven million, thirty-three thousand, nine hundred fifty-three".