55077222 has 8 divisors (see below), whose sum is σ = 110154456. Its totient is φ = 18359072.

The previous prime is 55077193. The next prime is 55077251. The reversal of 55077222 is 22277055.

It is an interprime number because it is at equal distance from previous prime (55077193) and next prime (55077251).

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

55077222 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 55077222.

It is a congruent number.

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, 4589763 + ... + 4589774.

It is an arithmetic number, because the mean of its divisors is an integer number (13769307).

Almost surely, 2^55077222 is an apocalyptic number.

55077222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55077222 is a wasteful number, since it uses less digits than its factorization.

55077222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9179542.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 55077222 is about 7421.4029670946. The cubic root of 55077222 is about 380.4731456278.

The spelling of 55077222 in words is "fifty-five million, seventy-seven thousand, two hundred twenty-two".