51615441 has 16 divisors (see below), whose sum is σ = 77056320. Its totient is φ = 34145280.

The previous prime is 51615439. The next prime is 51615469. The reversal of 51615441 is 14451615.

51615441 is a `hidden beast` number, since 5 + 1 + 615 + 4 + 41 = 666.

51615441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51615441 - 2¹ = 51615439 is a prime.

It is a super-3 number, since 3×51615441³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51615401) 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 15 ways as a sum of consecutive naturals, for example, 3760 + ... + 10833.

It is an arithmetic number, because the mean of its divisors is an integer number (4816020).

Almost surely, 2^51615441 is an apocalyptic number.

It is an amenable number.

51615441 is a deficient number, since it is larger than the sum of its proper divisors (25440879).

51615441 is a wasteful number, since it uses less digits than its factorization.

51615441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14733 (or 14727 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 51615441 is about 7184.3887005089. The cubic root of 51615441 is about 372.3287286745.

The spelling of 51615441 in words is "fifty-one million, six hundred fifteen thousand, four hundred forty-one".