55211616 has 36 divisors (see below), whose sum is σ = 157008852. Its totient is φ = 18403776.

The previous prime is 55211609. The next prime is 55211617. The reversal of 55211616 is 61611255.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 55211616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55211617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95566 + ... + 96141.

It is an arithmetic number, because the mean of its divisors is an integer number (4361357).

Almost surely, 2^55211616 is an apocalyptic number.

It is an amenable number.

55211616 is an abundant number, since it is smaller than the sum of its proper divisors (101797236).

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

55211616 is a wasteful number, since it uses less digits than its factorization.

55211616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191723 (or 191712 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 55211616 is about 7430.4519378030. The cubic root of 55211616 is about 380.7823585971.

The spelling of 55211616 in words is "fifty-five million, two hundred eleven thousand, six hundred sixteen".