51046540 has 24 divisors (see below), whose sum is σ = 112840560. Its totient is φ = 19343808.

The previous prime is 51046531. The next prime is 51046549. The reversal of 51046540 is 4564015.

It is an interprime number because it is at equal distance from previous prime (51046531) and next prime (51046549).

It is not an unprimeable number, because it can be changed into a prime (51046549) 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 7 ways as a sum of consecutive naturals, for example, 66787 + ... + 67546.

It is an arithmetic number, because the mean of its divisors is an integer number (4701690).

Almost surely, 2^51046540 is an apocalyptic number.

It is an amenable number.

51046540 is an abundant number, since it is smaller than the sum of its proper divisors (61794020).

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

51046540 is a wasteful number, since it uses less digits than its factorization.

51046540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134361 (or 134359 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51046540 is about 7144.6861372631. The cubic root of 51046540 is about 370.9557467626.

The spelling of 51046540 in words is "fifty-one million, forty-six thousand, five hundred forty".