51000531 has 8 divisors (see below), whose sum is σ = 70345680. Its totient is φ = 32827872.

The previous prime is 51000511. The next prime is 51000539. The reversal of 51000531 is 13500015.

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

It is not a de Polignac number, because 51000531 - 2¹¹ = 50998483 is a prime.

It is a super-2 number, since 2×51000531² = 5202108324563922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51000531.

It is not an unprimeable number, because it can be changed into a prime (51000539) 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, 293020 + ... + 293193.

It is an arithmetic number, because the mean of its divisors is an integer number (8793210).

Almost surely, 2^51000531 is an apocalyptic number.

51000531 is a deficient number, since it is larger than the sum of its proper divisors (19345149).

51000531 is a wasteful number, since it uses less digits than its factorization.

51000531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586245.

The product of its (nonzero) digits is 75, while the sum is 15.

The square root of 51000531 is about 7141.4656058823. The cubic root of 51000531 is about 370.8442639654.

Adding to 51000531 its reverse (13500015), we get a palindrome (64500546).

The spelling of 51000531 in words is "fifty-one million, five hundred thirty-one", and thus it is an aban number.