51727731 has 16 divisors (see below), whose sum is σ = 75364608. Its totient is φ = 31298400.

The previous prime is 51727729. The next prime is 51727751. The reversal of 51727731 is 13772715.

It is not a de Polignac number, because 51727731 - 2¹ = 51727729 is a prime.

It is a super-2 number, since 2×51727731² = 5351516308816722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 51727692 and 51727701.

It is not an unprimeable number, because it can be changed into a prime (51727721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31101 + ... + 32721.

It is an arithmetic number, because the mean of its divisors is an integer number (4710288).

Almost surely, 2^51727731 is an apocalyptic number.

51727731 is a deficient number, since it is larger than the sum of its proper divisors (23636877).

51727731 is a wasteful number, since it uses less digits than its factorization.

51727731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602.

The product of its digits is 10290, while the sum is 33.

The square root of 51727731 is about 7192.1993159256. The cubic root of 51727731 is about 372.5985349587.

The spelling of 51727731 in words is "fifty-one million, seven hundred twenty-seven thousand, seven hundred thirty-one".