1815554130 has 64 divisors (see below), whose sum is σ = 4699997568. Its totient is φ = 446192640.

The previous prime is 1815554113. The next prime is 1815554131. The reversal of 1815554130 is 314555181.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1815554091 and 1815554100.

It is not an unprimeable number, because it can be changed into a prime (1815554131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 266122 + ... + 272858.

It is an arithmetic number, because the mean of its divisors is an integer number (73437462).

Almost surely, 2^1815554130 is an apocalyptic number.

1815554130 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 1815554130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2349998784).

1815554130 is an abundant number, since it is smaller than the sum of its proper divisors (2884443438).

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

1815554130 is a wasteful number, since it uses less digits than its factorization.

1815554130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7451.

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 1815554130 is about 42609.3197551897. The cubic root of 1815554130 is about 1219.9341830479.

The spelling of 1815554130 in words is "one billion, eight hundred fifteen million, five hundred fifty-four thousand, one hundred thirty".