1555155030 has 128 divisors (see below), whose sum is σ = 4406814720. Its totient is φ = 346268160.

The previous prime is 1555155011. The next prime is 1555155037. The reversal of 1555155030 is 305515551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555155037) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 981619 + ... + 983201.

It is an arithmetic number, because the mean of its divisors is an integer number (34428240).

Almost surely, 2^1555155030 is an apocalyptic number.

1555155030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1555155030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2203407360).

1555155030 is an abundant number, since it is smaller than the sum of its proper divisors (2851659690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1555155030 is a wasteful number, since it uses less digits than its factorization.

1555155030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846.

The product of its (nonzero) digits is 9375, while the sum is 30.

The square root of 1555155030 is about 39435.4539722824. The cubic root of 1555155030 is about 1158.5760942232.

The spelling of 1555155030 in words is "one billion, five hundred fifty-five million, one hundred fifty-five thousand, thirty".