55122261 has 8 divisors (see below), whose sum is σ = 73644480. Its totient is φ = 36674112.

The previous prime is 55122241. The next prime is 55122289. The reversal of 55122261 is 16222155.

It is a happy number.

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

It is not a de Polignac number, because 55122261 - 2¹³ = 55114069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55122241) 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, 16756 + ... + 19773.

It is an arithmetic number, because the mean of its divisors is an integer number (9205560).

Almost surely, 2^55122261 is an apocalyptic number.

It is an amenable number.

55122261 is a deficient number, since it is larger than the sum of its proper divisors (18522219).

55122261 is a wasteful number, since it uses less digits than its factorization.

55122261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37035.

The product of its digits is 1200, while the sum is 24.

The square root of 55122261 is about 7424.4367463128. The cubic root of 55122261 is about 380.5768270924.

The spelling of 55122261 in words is "fifty-five million, one hundred twenty-two thousand, two hundred sixty-one".