181142450 has 24 divisors (see below), whose sum is σ = 337307652. Its totient is φ = 72374720.

The previous prime is 181142443. The next prime is 181142453. The reversal of 181142450 is 54241181.

It can be written as a sum of positive squares in 6 ways, for example, as 30614089 + 150528361 = 5533^2 + 12269^2 .

It is not an unprimeable number, because it can be changed into a prime (181142453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62432 + ... + 65268.

Almost surely, 2^181142450 is an apocalyptic number.

181142450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181142450 is a deficient number, since it is larger than the sum of its proper divisors (156165202).

181142450 is a wasteful number, since it uses less digits than its factorization.

181142450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4126 (or 4121 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 181142450 is about 13458.9171184015. The cubic root of 181142450 is about 565.8136396536.

The spelling of 181142450 in words is "one hundred eighty-one million, one hundred forty-two thousand, four hundred fifty".