1815554132 has 12 divisors (see below), whose sum is σ = 3631108320. Its totient is φ = 778094616.

The previous prime is 1815554131. The next prime is 1815554149. The reversal of 1815554132 is 2314555181.

1815554132 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1815554092 and 1815554101.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 32420582 + ... + 32420637.

It is an arithmetic number, because the mean of its divisors is an integer number (302592360).

Almost surely, 2^1815554132 is an apocalyptic number.

It is an amenable number.

1815554132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1815554132 is a wasteful number, since it uses less digits than its factorization.

1815554132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64841230 (or 64841228 counting only the distinct ones).

The product of its digits is 24000, while the sum is 35.

The square root of 1815554132 is about 42609.3197786588. The cubic root of 1815554132 is about 1219.9341834959.

It can be divided in two parts, 181555413 and 2, that multiplied together give a triangular number (363110826 = T₂₆₉₄₈).

The spelling of 1815554132 in words is "one billion, eight hundred fifteen million, five hundred fifty-four thousand, one hundred thirty-two".