51540741 has 24 divisors (see below), whose sum is σ = 87386624. Its totient is φ = 28654560.

The previous prime is 51540707. The next prime is 51540757. The reversal of 51540741 is 14704515.

It is a happy number.

51540741 is a `hidden beast` number, since 51 + 540 + 74 + 1 = 666.

It is not a de Polignac number, because 51540741 - 2⁷ = 51540613 is a prime.

It is a super-3 number, since 3×51540741³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51540781) 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 23 ways as a sum of consecutive naturals, for example, 8725 + ... + 13386.

Almost surely, 2^51540741 is an apocalyptic number.

It is an amenable number.

51540741 is a deficient number, since it is larger than the sum of its proper divisors (35845883).

51540741 is a wasteful number, since it uses less digits than its factorization.

51540741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22161 (or 22158 counting only the distinct ones).

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

The square root of 51540741 is about 7179.1880460119. The cubic root of 51540741 is about 372.1490254459.

The spelling of 51540741 in words is "fifty-one million, five hundred forty thousand, seven hundred forty-one".