51450080 has 192 divisors, whose sum is σ = 146313216. Its totient is φ = 16896000.

The previous prime is 51450073. The next prime is 51450083. The reversal of 51450080 is 8005415.

It is a super-2 number, since 2×51450080² = 5294221464012800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51450083) 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, 1254860 + ... + 1254900.

It is an arithmetic number, because the mean of its divisors is an integer number (762048).

Almost surely, 2^51450080 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 51450080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73156608).

51450080 is an abundant number, since it is smaller than the sum of its proper divisors (94863136).

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

51450080 is a wasteful number, since it uses less digits than its factorization.

51450080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 51450080 is about 7172.8711127414. The cubic root of 51450080 is about 371.9306919863.

Adding to 51450080 its reverse (8005415), we get a palindrome (59455495).

The spelling of 51450080 in words is "fifty-one million, four hundred fifty thousand, eighty".