53142222 has 48 divisors (see below), whose sum is σ = 123693696. Its totient is φ = 14910000.

The previous prime is 53142211. The next prime is 53142227. The reversal of 53142222 is 22224135.

It is a Harshad number since it is a multiple of its sum of digits (21).

53142222 is a Rhonda number in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53142227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211597 + ... + 211847.

It is an arithmetic number, because the mean of its divisors is an integer number (2576952).

Almost surely, 2^53142222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53142222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61846848).

53142222 is an abundant number, since it is smaller than the sum of its proper divisors (70551474).

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

53142222 is a wasteful number, since it uses less digits than its factorization.

53142222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 334 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 53142222 is about 7289.8711922777. The cubic root of 53142222 is about 375.9642668245.

Adding to 53142222 its reverse (22224135), we get a palindrome (75366357).

The spelling of 53142222 in words is "fifty-three million, one hundred forty-two thousand, two hundred twenty-two".