51463720 has 192 divisors, whose sum is σ = 153216000. Its totient is φ = 15523200.

The previous prime is 51463691. The next prime is 51463739. The reversal of 51463720 is 2736415.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1660105 + ... + 1660135.

It is an arithmetic number, because the mean of its divisors is an integer number (798000).

Almost surely, 2^51463720 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 51463720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76608000).

51463720 is an abundant number, since it is smaller than the sum of its proper divisors (101752280).

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

51463720 is a wasteful number, since it uses less digits than its factorization.

51463720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 51463720 is about 7173.8218544929. The cubic root of 51463720 is about 371.9635567645.

The spelling of 51463720 in words is "fifty-one million, four hundred sixty-three thousand, seven hundred twenty".