1553131361 has 2 divisors, whose sum is σ = 1553131362. Its totient is φ = 1553131360.

The previous prime is 1553131331. The next prime is 1553131367. The reversal of 1553131361 is 1631313551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 901860961 + 651270400 = 30031^2 + 25520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1553131361 - 2⁶ = 1553131297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1553131367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776565680 + 776565681.

It is an arithmetic number, because the mean of its divisors is an integer number (776565681).

Almost surely, 2^1553131361 is an apocalyptic number.

It is an amenable number.

1553131361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553131361 is an equidigital number, since it uses as much as digits as its factorization.

1553131361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4050, while the sum is 29.

The square root of 1553131361 is about 39409.7876294709. The cubic root of 1553131361 is about 1158.0733378661.

The spelling of 1553131361 in words is "one billion, five hundred fifty-three million, one hundred thirty-one thousand, three hundred sixty-one".