1555490223 has 40 divisors (see below), whose sum is σ = 2693053440. Its totient is φ = 876309840.

The previous prime is 1555490177. The next prime is 1555490243. The reversal of 1555490223 is 3220945551.

It is a happy number.

1555490223 is a `hidden beast` number, since 15 + 554 + 90 + 2 + 2 + 3 = 666.

It is not a de Polignac number, because 1555490223 - 2⁹ = 1555489711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555490243) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20938 + ... + 59576.

It is an arithmetic number, because the mean of its divisors is an integer number (67326336).

Almost surely, 2^1555490223 is an apocalyptic number.

1555490223 is a deficient number, since it is larger than the sum of its proper divisors (1137563217).

1555490223 is an equidigital number, since it uses as much as digits as its factorization.

1555490223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38729 (or 38720 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 1555490223 is about 39439.7036373247. The cubic root of 1555490223 is about 1158.6593268038.

The spelling of 1555490223 in words is "one billion, five hundred fifty-five million, four hundred ninety thousand, two hundred twenty-three".