51221112 has 32 divisors (see below), whose sum is σ = 134793600. Its totient is φ = 16174944.

The previous prime is 51221101. The next prime is 51221123. The reversal of 51221112 is 21112215.

It is an interprime number because it is at equal distance from previous prime (51221101) and next prime (51221123).

It is a super-3 number, since 3×51221112³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51221091 and 51221100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55708 + ... + 56619.

It is an arithmetic number, because the mean of its divisors is an integer number (4212300).

Almost surely, 2^51221112 is an apocalyptic number.

It is an amenable number.

51221112 is an abundant number, since it is smaller than the sum of its proper divisors (83572488).

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

51221112 is a wasteful number, since it uses less digits than its factorization.

51221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112355 (or 112351 counting only the distinct ones).

The product of its digits is 40, while the sum is 15.

The square root of 51221112 is about 7156.8926218017. The cubic root of 51221112 is about 371.3781378128.

Adding to 51221112 its reverse (21112215), we get a palindrome (72333327).

The spelling of 51221112 in words is "fifty-one million, two hundred twenty-one thousand, one hundred twelve".