51400412 has 36 divisors (see below), whose sum is σ = 108256680. Its totient is φ = 21266784.

The previous prime is 51400411. The next prime is 51400421. The reversal of 51400412 is 21400415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51400411) 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, 1163 + ... + 10205.

It is an arithmetic number, because the mean of its divisors is an integer number (3007130).

Almost surely, 2^51400412 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 51400412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54128340).

51400412 is an abundant number, since it is smaller than the sum of its proper divisors (56856268).

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

51400412 is a wasteful number, since it uses less digits than its factorization.

51400412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090 (or 9081 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 51400412 is about 7169.4080648266. The cubic root of 51400412 is about 371.8109707523.

Adding to 51400412 its reverse (21400415), we get a palindrome (72800827).

The spelling of 51400412 in words is "fifty-one million, four hundred thousand, four hundred twelve".