1815225048 has 384 divisors, whose sum is σ = 6572966400. Its totient is φ = 438939648.

The previous prime is 1815225017. The next prime is 1815225077. The reversal of 1815225048 is 8405225181.

1815225048 is a `hidden beast` number, since 1 + 81 + 522 + 50 + 4 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4789323 + ... + 4789701.

It is an arithmetic number, because the mean of its divisors is an integer number (17117100).

Almost surely, 2^1815225048 is an apocalyptic number.

1815225048 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1815225048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3286483200).

1815225048 is an abundant number, since it is smaller than the sum of its proper divisors (4757741352).

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

1815225048 is a wasteful number, since it uses less digits than its factorization.

1815225048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The square root of 1815225048 is about 42605.4579602191. The cubic root of 1815225048 is about 1219.8604713672.

The spelling of 1815225048 in words is "one billion, eight hundred fifteen million, two hundred twenty-five thousand, forty-eight".