51946320 has 80 divisors (see below), whose sum is σ = 162703872. Its totient is φ = 13708800.

The previous prime is 51946309. The next prime is 51946333. The reversal of 51946320 is 2364915.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 23169 + ... + 25311.

Almost surely, 2^51946320 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 51946320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81351936).

51946320 is an abundant number, since it is smaller than the sum of its proper divisors (110757552).

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

51946320 is a wasteful number, since it uses less digits than its factorization.

51946320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2260 (or 2254 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 51946320 is about 7207.3795515430. The cubic root of 51946320 is about 373.1226347950.

The spelling of 51946320 in words is "fifty-one million, nine hundred forty-six thousand, three hundred twenty".