181872054 has 160 divisors (see below), whose sum is σ = 511452480. Its totient is φ = 47309184.

The previous prime is 181872037. The next prime is 181872107. The reversal of 181872054 is 450278181.

It is a super-3 number, since 3×181872054³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2491362 + ... + 2491434.

It is an arithmetic number, because the mean of its divisors is an integer number (3196578).

Almost surely, 2^181872054 is an apocalyptic number.

181872054 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 181872054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255726240).

181872054 is an abundant number, since it is smaller than the sum of its proper divisors (329580426).

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

181872054 is an equidigital number, since it uses as much as digits as its factorization.

181872054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 181872054 is about 13485.9947352800. The cubic root of 181872054 is about 566.5722817809.

The spelling of 181872054 in words is "one hundred eighty-one million, eight hundred seventy-two thousand, fifty-four".