1555242550 has 12 divisors (see below), whose sum is σ = 2892751236. Its totient is φ = 622097000.

The previous prime is 1555242529. The next prime is 1555242553. The reversal of 1555242550 is 552425551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555242553) 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 5 ways as a sum of consecutive naturals, for example, 15552376 + ... + 15552475.

It is an arithmetic number, because the mean of its divisors is an integer number (241062603).

Almost surely, 2^1555242550 is an apocalyptic number.

1555242550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1555242550 is a deficient number, since it is larger than the sum of its proper divisors (1337508686).

1555242550 is a wasteful number, since it uses less digits than its factorization.

1555242550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31104863 (or 31104858 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 34.

The square root of 1555242550 is about 39436.5636180436. The cubic root of 1555242550 is about 1158.5978276787.

The spelling of 1555242550 in words is "one billion, five hundred fifty-five million, two hundred forty-two thousand, five hundred fifty".