51442212 has 12 divisors (see below), whose sum is σ = 120031856. Its totient is φ = 17147400.

The previous prime is 51442207. The next prime is 51442219. The reversal of 51442212 is 21224415.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (51442219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2143414 + ... + 2143437.

Almost surely, 2^51442212 is an apocalyptic number.

It is an amenable number.

51442212 is an abundant number, since it is smaller than the sum of its proper divisors (68589644).

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

51442212 is a wasteful number, since it uses less digits than its factorization.

51442212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4286858 (or 4286856 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 51442212 is about 7172.3226363571. The cubic root of 51442212 is about 371.9117318612.

Adding to 51442212 its reverse (21224415), we get a palindrome (72666627).

The spelling of 51442212 in words is "fifty-one million, four hundred forty-two thousand, two hundred twelve".