51913470 has 64 divisors (see below), whose sum is σ = 145728000. Its totient is φ = 11587968.

The previous prime is 51913469. The next prime is 51913471. The reversal of 51913470 is 7431915.

51913470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51913469) and next prime (51913471).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51913471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6156 + ... + 11904.

It is an arithmetic number, because the mean of its divisors is an integer number (2277000).

Almost surely, 2^51913470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51913470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72864000).

51913470 is an abundant number, since it is smaller than the sum of its proper divisors (93814530).

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

51913470 is a wasteful number, since it uses less digits than its factorization.

51913470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5809.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 51913470 is about 7205.1002768872. The cubic root of 51913470 is about 373.0439660001.

The spelling of 51913470 in words is "fifty-one million, nine hundred thirteen thousand, four hundred seventy".