51415740 has 36 divisors (see below), whose sum is σ = 155961624. Its totient is φ = 13710816.

The previous prime is 51415739. The next prime is 51415751. The reversal of 51415740 is 4751415.

It is a happy number.

51415740 is a `hidden beast` number, since 51 + 41 + 574 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×51415740³ (a number of 24 digits) contains 333 as substring.

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 11 ways as a sum of consecutive naturals, for example, 142642 + ... + 143001.

Almost surely, 2^51415740 is an apocalyptic number.

It is an amenable number.

51415740 is an abundant number, since it is smaller than the sum of its proper divisors (104545884).

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

51415740 is a wasteful number, since it uses less digits than its factorization.

51415740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285658 (or 285653 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 51415740 is about 7170.4769715829. The cubic root of 51415740 is about 371.8479260472.

The spelling of 51415740 in words is "fifty-one million, four hundred fifteen thousand, seven hundred forty".