51071533 has 8 divisors (see below), whose sum is σ = 51499800. Its totient is φ = 50645568.

The previous prime is 51071483. The next prime is 51071611. The reversal of 51071533 is 33517015.

It can be written as a sum of positive squares in 4 ways, for example, as 5076009 + 45995524 = 2253^2 + 6782^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51071533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51071498 and 51071507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51071333) 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, 100083 + ... + 100591.

It is an arithmetic number, because the mean of its divisors is an integer number (6437475).

Almost surely, 2^51071533 is an apocalyptic number.

It is an amenable number.

51071533 is a deficient number, since it is larger than the sum of its proper divisors (428267).

51071533 is a wasteful number, since it uses less digits than its factorization.

51071533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151.

The product of its (nonzero) digits is 1575, while the sum is 25.

The square root of 51071533 is about 7146.4349853616. The cubic root of 51071533 is about 371.0162783499.

Adding to 51071533 its reverse (33517015), we get a palindrome (84588548).

The spelling of 51071533 in words is "fifty-one million, seventy-one thousand, five hundred thirty-three".