182722421 has 12 divisors (see below), whose sum is σ = 213042060. Its totient is φ = 156260160.

The previous prime is 182722399. The next prime is 182722451. The reversal of 182722421 is 124227281.

It can be written as a sum of positive squares in 2 ways, for example, as 22193521 + 160528900 = 4711^2 + 12670^2 .

It is not a de Polignac number, because 182722421 - 2⁶ = 182722357 is a prime.

It is a super-2 number, since 2×182722421² = 66774966272202482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (182722451) 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, 18545 + ... + 26633.

It is an arithmetic number, because the mean of its divisors is an integer number (17753505).

Almost surely, 2^182722421 is an apocalyptic number.

It is an amenable number.

182722421 is a deficient number, since it is larger than the sum of its proper divisors (30319639).

182722421 is an equidigital number, since it uses as much as digits as its factorization.

182722421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8564 (or 8557 counting only the distinct ones).

The product of its digits is 3584, while the sum is 29.

The square root of 182722421 is about 13517.4857499463. The cubic root of 182722421 is about 567.4539371489.

The spelling of 182722421 in words is "one hundred eighty-two million, seven hundred twenty-two thousand, four hundred twenty-one".