55722147 has 16 divisors (see below), whose sum is σ = 80603040. Its totient is φ = 34036992.

The previous prime is 55722131. The next prime is 55722167. The reversal of 55722147 is 74122755.

It is not a de Polignac number, because 55722147 - 2⁴ = 55722131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55722127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129 + ... + 10557.

It is an arithmetic number, because the mean of its divisors is an integer number (5037690).

Almost surely, 2^55722147 is an apocalyptic number.

55722147 is a deficient number, since it is larger than the sum of its proper divisors (24880893).

55722147 is a wasteful number, since it uses less digits than its factorization.

55722147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10582.

The product of its digits is 19600, while the sum is 33.

The square root of 55722147 is about 7464.7268536766. The cubic root of 55722147 is about 381.9524327895.

The spelling of 55722147 in words is "fifty-five million, seven hundred twenty-two thousand, one hundred forty-seven".