53442220 has 96 divisors (see below), whose sum is σ = 130310208. Its totient is φ = 18235392.

The previous prime is 53442217. The next prime is 53442223. The reversal of 53442220 is 2224435.

It is an interprime number because it is at equal distance from previous prime (53442217) and next prime (53442223).

It is a junction number, because it is equal to n+sod(n) for n = 53442191 and 53442200.

It is not an unprimeable number, because it can be changed into a prime (53442223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 472884 + ... + 472996.

It is an arithmetic number, because the mean of its divisors is an integer number (1357398).

Almost surely, 2^53442220 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 53442220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65155104).

53442220 is an abundant number, since it is smaller than the sum of its proper divisors (76867988).

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

53442220 is a wasteful number, since it uses less digits than its factorization.

53442220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 53442220 is about 7310.4185926662. The cubic root of 53442220 is about 376.6704031094.

Adding to 53442220 its reverse (2224435), we get a palindrome (55666655).

The spelling of 53442220 in words is "fifty-three million, four hundred forty-two thousand, two hundred twenty".