442111252 has 36 divisors (see below), whose sum is σ = 852647040. Its totient is φ = 200434960.

The previous prime is 442111217. The next prime is 442111253. The reversal of 442111252 is 252111244.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442111253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230883 + ... + 232789.

It is an arithmetic number, because the mean of its divisors is an integer number (23684640).

Almost surely, 2^442111252 is an apocalyptic number.

It is an amenable number.

442111252 is a deficient number, since it is larger than the sum of its proper divisors (410535788).

442111252 is a wasteful number, since it uses less digits than its factorization.

442111252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412 (or 2399 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 442111252 is about 21026.4417341594. The cubic root of 442111252 is about 761.8050653760.

Adding to 442111252 its reverse (252111244), we get a palindrome (694222496).

The spelling of 442111252 in words is "four hundred forty-two million, one hundred eleven thousand, two hundred fifty-two".