55722130 has 16 divisors (see below), whose sum is σ = 100467864. Its totient is φ = 22251520.

The previous prime is 55722127. The next prime is 55722131. The reversal of 55722130 is 3122755.

It can be written as a sum of positive squares in 4 ways, for example, as 42523441 + 13198689 = 6521^2 + 3633^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55722095 and 55722104.

It is not an unprimeable number, because it can be changed into a prime (55722131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2064 + ... + 10756.

Almost surely, 2^55722130 is an apocalyptic number.

55722130 is a deficient number, since it is larger than the sum of its proper divisors (44745734).

55722130 is a wasteful number, since it uses less digits than its factorization.

55722130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9341.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 55722130 is about 7464.7257149878. The cubic root of 55722130 is about 381.9523939468.

Adding to 55722130 its reverse (3122755), we get a palindrome (58844885).

The spelling of 55722130 in words is "fifty-five million, seven hundred twenty-two thousand, one hundred thirty".