55281722 has 8 divisors (see below), whose sum is σ = 87800436. Its totient is φ = 26014912.

The previous prime is 55281713. The next prime is 55281731. The reversal of 55281722 is 22718255.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55281713) and next prime (55281731).

It can be written as a sum of positive squares in 2 ways, for example, as 54922921 + 358801 = 7411^2 + 599^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812933 + ... + 813000.

Almost surely, 2^55281722 is an apocalyptic number.

55281722 is a deficient number, since it is larger than the sum of its proper divisors (32518714).

55281722 is a wasteful number, since it uses less digits than its factorization.

55281722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625952.

The product of its digits is 11200, while the sum is 32.

The square root of 55281722 is about 7435.1679200943. The cubic root of 55281722 is about 380.9434589781.

Adding to 55281722 its reverse (22718255), we get a palindrome (77999977).

The spelling of 55281722 in words is "fifty-five million, two hundred eighty-one thousand, seven hundred twenty-two".