1213553057 has 2 divisors, whose sum is σ = 1213553058. Its totient is φ = 1213553056.

The previous prime is 1213553051. The next prime is 1213553069. The reversal of 1213553057 is 7503553121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1203812416 + 9740641 = 34696^2 + 3121^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213553057 - 2⁸ = 1213552801 is a prime.

It is a super-2 number, since 2×1213553057² = 2945422044308090498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1213553051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606776528 + 606776529.

It is an arithmetic number, because the mean of its divisors is an integer number (606776529).

Almost surely, 2^1213553057 is an apocalyptic number.

It is an amenable number.

1213553057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213553057 is an equidigital number, since it uses as much as digits as its factorization.

1213553057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 1213553057 is about 34836.0884285248. The cubic root of 1213553057 is about 1066.6442328073.

The spelling of 1213553057 in words is "one billion, two hundred thirteen million, five hundred fifty-three thousand, fifty-seven".