51470940 has 48 divisors (see below), whose sum is σ = 149093280. Its totient is φ = 13251840.

The previous prime is 51470933. The next prime is 51470963. The reversal of 51470940 is 4907415.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 51470898 and 51470907.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13051 + ... + 16530.

It is an arithmetic number, because the mean of its divisors is an integer number (3106110).

Almost surely, 2^51470940 is an apocalyptic number.

It is an amenable number.

51470940 is an abundant number, since it is smaller than the sum of its proper divisors (97622340).

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

51470940 is a wasteful number, since it uses less digits than its factorization.

51470940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29622 (or 29620 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 51470940 is about 7174.3250553624. The cubic root of 51470940 is about 371.9809505796.

The spelling of 51470940 in words is "fifty-one million, four hundred seventy thousand, nine hundred forty".