51749412 has 96 divisors (see below), whose sum is σ = 144789120. Its totient is φ = 14177280.

The previous prime is 51749389. The next prime is 51749419. The reversal of 51749412 is 21494715.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (51749419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90664 + ... + 91232.

It is an arithmetic number, because the mean of its divisors is an integer number (1508220).

Almost surely, 2^51749412 is an apocalyptic number.

51749412 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51749412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72394560).

51749412 is an abundant number, since it is smaller than the sum of its proper divisors (93039708).

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

51749412 is a wasteful number, since it uses less digits than its factorization.

51749412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 651 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 51749412 is about 7193.7064160278. The cubic root of 51749412 is about 372.6505842838.

The spelling of 51749412 in words is "fifty-one million, seven hundred forty-nine thousand, four hundred twelve".