1531996057 has 2 divisors, whose sum is σ = 1531996058. Its totient is φ = 1531996056.

The previous prime is 1531996033. The next prime is 1531996069. The reversal of 1531996057 is 7506991351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1141696521 + 390299536 = 33789^2 + 19756^2 .

It is a cyclic number.

It is not a de Polignac number, because 1531996057 - 2⁷ = 1531995929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1531995998 and 1531996016.

It is not a weakly prime, because it can be changed into another prime (1531996007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765998028 + 765998029.

It is an arithmetic number, because the mean of its divisors is an integer number (765998029).

Almost surely, 2^1531996057 is an apocalyptic number.

It is an amenable number.

1531996057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531996057 is an equidigital number, since it uses as much as digits as its factorization.

1531996057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 255150, while the sum is 46.

The square root of 1531996057 is about 39140.7212120574. The cubic root of 1531996057 is about 1152.7962343641.

The spelling of 1531996057 in words is "one billion, five hundred thirty-one million, nine hundred ninety-six thousand, fifty-seven".