51463020 has 96 divisors (see below), whose sum is σ = 173376000. Its totient is φ = 11142144.

The previous prime is 51463003. The next prime is 51463021. The reversal of 51463020 is 2036415.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (51463021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4756 + ... + 11204.

It is an arithmetic number, because the mean of its divisors is an integer number (1806000).

Almost surely, 2^51463020 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 51463020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86688000).

51463020 is an abundant number, since it is smaller than the sum of its proper divisors (121912980).

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

51463020 is a wasteful number, since it uses less digits than its factorization.

51463020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6487 (or 6485 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 51463020 is about 7173.7730658281. The cubic root of 51463020 is about 371.9618702970.

Adding to 51463020 its reverse (2036415), we get a palindrome (53499435).

The spelling of 51463020 in words is "fifty-one million, four hundred sixty-three thousand, twenty".