51030031 has 8 divisors (see below), whose sum is σ = 57345120. Its totient is φ = 45056352.

The previous prime is 51030017. The next prime is 51030037. The reversal of 51030031 is 13003015.

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 51030031 - 2²¹ = 48932879 is a prime.

It is a super-2 number, since 2×51030031² = 5208128127721922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51029993 and 51030020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51030037) 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 7 ways as a sum of consecutive naturals, for example, 85036 + ... + 85633.

It is an arithmetic number, because the mean of its divisors is an integer number (7168140).

Almost surely, 2^51030031 is an apocalyptic number.

51030031 is a deficient number, since it is larger than the sum of its proper divisors (6315089).

51030031 is a wasteful number, since it uses less digits than its factorization.

51030031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170705.

The product of its (nonzero) digits is 45, while the sum is 13.

The square root of 51030031 is about 7143.5307096701. The cubic root of 51030031 is about 370.9157520914.

Adding to 51030031 its reverse (13003015), we get a palindrome (64033046).

The spelling of 51030031 in words is "fifty-one million, thirty thousand, thirty-one".