53770220 has 48 divisors (see below), whose sum is σ = 129669120. Its totient is φ = 18346944.

The previous prime is 53770183. The next prime is 53770231. The reversal of 53770220 is 2207735.

It is a self number, because there is not a number n which added to its sum of digits gives 53770220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32657 + ... + 34263.

It is an arithmetic number, because the mean of its divisors is an integer number (2701440).

Almost surely, 2^53770220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53770220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64834560).

53770220 is an abundant number, since it is smaller than the sum of its proper divisors (75898900).

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

53770220 is a wasteful number, since it uses less digits than its factorization.

53770220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862 (or 1860 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 26.

The square root of 53770220 is about 7332.8180121969. The cubic root of 53770220 is about 377.4394329975.

Adding to 53770220 its reverse (2207735), we get a palindrome (55977955).

The spelling of 53770220 in words is "fifty-three million, seven hundred seventy thousand, two hundred twenty".