55122057 has 12 divisors (see below), whose sum is σ = 80743104. Its totient is φ = 36230040.

The previous prime is 55122037. The next prime is 55122077. The reversal of 55122057 is 75022155.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55122037) and next prime (55122077).

It is not a de Polignac number, because 55122057 - 2⁶ = 55121993 is a prime.

It is a super-2 number, since 2×55122057² = 6076882335822498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55122057.

It is not an unprimeable number, because it can be changed into a prime (55122037) 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, 42493 + ... + 43770.

It is an arithmetic number, because the mean of its divisors is an integer number (6728592).

Almost surely, 2^55122057 is an apocalyptic number.

It is an amenable number.

55122057 is a deficient number, since it is larger than the sum of its proper divisors (25621047).

55122057 is a wasteful number, since it uses less digits than its factorization.

55122057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86340 (or 86337 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 55122057 is about 7424.4230078842. The cubic root of 55122057 is about 380.5763576042.

It can be divided in two parts, 5512 and 2057, that added together give a square (7569 = 87²).

The spelling of 55122057 in words is "fifty-five million, one hundred twenty-two thousand, fifty-seven".