1555421413 has 24 divisors (see below), whose sum is σ = 1969712448. Its totient is φ = 1202003712.

The previous prime is 1555421401. The next prime is 1555421419. The reversal of 1555421413 is 3141245551.

It is not a de Polignac number, because 1555421413 - 2⁵ = 1555421381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555421419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35581 + ... + 66157.

It is an arithmetic number, because the mean of its divisors is an integer number (82071352).

Almost surely, 2^1555421413 is an apocalyptic number.

1555421413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1555421413 is a deficient number, since it is larger than the sum of its proper divisors (414291035).

1555421413 is a wasteful number, since it uses less digits than its factorization.

1555421413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30653 (or 30640 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 1555421413 is about 39438.8312833938. The cubic root of 1555421413 is about 1158.6422414025.

Adding to 1555421413 its reverse (3141245551), we get a palindrome (4696666964).

The spelling of 1555421413 in words is "one billion, five hundred fifty-five million, four hundred twenty-one thousand, four hundred thirteen".