51100031 has 8 divisors (see below), whose sum is σ = 51607104. Its totient is φ = 50595840.

The previous prime is 51100019. The next prime is 51100033. The reversal of 51100031 is 13000115.

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 51100031 - 2⁶ = 51099967 is a prime.

It is a super-2 number, since 2×51100031² = 5222426336401922, 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 = 51099985 and 51100021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51100033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51815 + ... + 52791.

It is an arithmetic number, because the mean of its divisors is an integer number (6450888).

Almost surely, 2^51100031 is an apocalyptic number.

51100031 is a deficient number, since it is larger than the sum of its proper divisors (507073).

51100031 is a wasteful number, since it uses less digits than its factorization.

51100031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441.

The product of its (nonzero) digits is 15, while the sum is 11.

The square root of 51100031 is about 7148.4285685737. The cubic root of 51100031 is about 371.0852747507.

Adding to 51100031 its reverse (13000115), we get a palindrome (64100146).

The spelling of 51100031 in words is "fifty-one million, one hundred thousand, thirty-one".