55211070 has 64 divisors (see below), whose sum is σ = 145177920. Its totient is φ = 13375488.

The previous prime is 55211069. The next prime is 55211089. The reversal of 55211070 is 7011255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12924 + ... + 16656.

It is an arithmetic number, because the mean of its divisors is an integer number (2268405).

Almost surely, 2^55211070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55211070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72588960).

55211070 is an abundant number, since it is smaller than the sum of its proper divisors (89966850).

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

55211070 is a wasteful number, since it uses less digits than its factorization.

55211070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3789.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 55211070 is about 7430.4151970129. The cubic root of 55211070 is about 380.7811033790.

The spelling of 55211070 in words is "fifty-five million, two hundred eleven thousand, seventy".