51343531 has 8 divisors (see below), whose sum is σ = 52859520. Its totient is φ = 49834368.

The previous prime is 51343483. The next prime is 51343549. The reversal of 51343531 is 13534315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51343531 - 2¹⁷ = 51212459 is a prime.

It is a super-2 number, since 2×51343531² = 5272316351095922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51343496 and 51343505.

It is not an unprimeable number, because it can be changed into a prime (51343561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16275 + ... + 19171.

It is an arithmetic number, because the mean of its divisors is an integer number (6607440).

Almost surely, 2^51343531 is an apocalyptic number.

51343531 is a deficient number, since it is larger than the sum of its proper divisors (1515989).

51343531 is a wasteful number, since it uses less digits than its factorization.

51343531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3413.

The product of its digits is 2700, while the sum is 25.

The square root of 51343531 is about 7165.4400423142. The cubic root of 51343531 is about 371.6737683115.

Adding to 51343531 its reverse (13534315), we get a palindrome (64877846).

It can be divided in two parts, 513 and 43531, that added together give a palindrome (44044).

The spelling of 51343531 in words is "fifty-one million, three hundred forty-three thousand, five hundred thirty-one".