51445368 has 160 divisors (see below), whose sum is σ = 160997760. Its totient is φ = 15240960.

The previous prime is 51445357. The next prime is 51445421. The reversal of 51445368 is 86354415.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 261046 + ... + 261242.

It is an arithmetic number, because the mean of its divisors is an integer number (1006236).

Almost surely, 2^51445368 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 51445368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80498880).

51445368 is an abundant number, since it is smaller than the sum of its proper divisors (109552392).

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

51445368 is a wasteful number, since it uses less digits than its factorization.

51445368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 246 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 51445368 is about 7172.5426453943. The cubic root of 51445368 is about 371.9193373495.

The spelling of 51445368 in words is "fifty-one million, four hundred forty-five thousand, three hundred sixty-eight".