1555411139 has 2 divisors, whose sum is σ = 1555411140. Its totient is φ = 1555411138.

The previous prime is 1555411063. The next prime is 1555411147. The reversal of 1555411139 is 9311145551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1555411139 is a prime.

It is a super-2 number, since 2×1555411139² = 4838607622650554642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1555411099 and 1555411108.

It is not a weakly prime, because it can be changed into another prime (1555411189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777705569 + 777705570.

It is an arithmetic number, because the mean of its divisors is an integer number (777705570).

Almost surely, 2^1555411139 is an apocalyptic number.

1555411139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555411139 is an equidigital number, since it uses as much as digits as its factorization.

1555411139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 35.

The square root of 1555411139 is about 39438.7010308403. The cubic root of 1555411139 is about 1158.6396903433.

The spelling of 1555411139 in words is "one billion, five hundred fifty-five million, four hundred eleven thousand, one hundred thirty-nine".