1555142031 has 16 divisors (see below), whose sum is σ = 2439439200. Its totient is φ = 975775104.

The previous prime is 1555142027. The next prime is 1555142041. The reversal of 1555142031 is 1302415551.

It is not a de Polignac number, because 1555142031 - 2² = 1555142027 is a prime.

It is a super-2 number, since 2×1555142031² = 4836933473165609922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1555141986 and 1555142004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555142021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1693596 + ... + 1694513.

It is an arithmetic number, because the mean of its divisors is an integer number (152464950).

Almost surely, 2^1555142031 is an apocalyptic number.

1555142031 is a deficient number, since it is larger than the sum of its proper divisors (884297169).

1555142031 is a wasteful number, since it uses less digits than its factorization.

1555142031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388135 (or 3388129 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1555142031 is about 39435.2891583161. The cubic root of 1555142031 is about 1158.5728661694.

Adding to 1555142031 its reverse (1302415551), we get a palindrome (2857557582).

The spelling of 1555142031 in words is "one billion, five hundred fifty-five million, one hundred forty-two thousand, thirty-one".