51211412 has 48 divisors (see below), whose sum is σ = 109122048. Its totient is φ = 20528640.

The previous prime is 51211387. The next prime is 51211421. The reversal of 51211412 is 21411215.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128798 + ... + 129194.

It is an arithmetic number, because the mean of its divisors is an integer number (2273376).

Almost surely, 2^51211412 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 51211412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54561024).

51211412 is an abundant number, since it is smaller than the sum of its proper divisors (57910636).

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

51211412 is a wasteful number, since it uses less digits than its factorization.

51211412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 694 counting only the distinct ones).

The product of its digits is 80, while the sum is 17.

The square root of 51211412 is about 7156.2149213114. The cubic root of 51211412 is about 371.3546930832.

Adding to 51211412 its reverse (21411215), we get a palindrome (72622627).

The spelling of 51211412 in words is "fifty-one million, two hundred eleven thousand, four hundred twelve".