51031103 has 12 divisors (see below), whose sum is σ = 53526648. Its totient is φ = 48615840.

The previous prime is 51031081. The next prime is 51031109. The reversal of 51031103 is 30113015.

It is not a de Polignac number, because 51031103 - 2¹⁰ = 51030079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51031109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103688 + ... + 104178.

It is an arithmetic number, because the mean of its divisors is an integer number (4460554).

Almost surely, 2^51031103 is an apocalyptic number.

51031103 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

51031103 is a deficient number, since it is larger than the sum of its proper divisors (2495545).

51031103 is an equidigital number, since it uses as much as digits as its factorization.

51031103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 45, while the sum is 14.

The square root of 51031103 is about 7143.6057422005. The cubic root of 51031103 is about 370.9183493784.

Adding to 51031103 its reverse (30113015), we get a palindrome (81144118).

It can be divided in two parts, 510 and 31103, that added together give a palindrome (31613).

The spelling of 51031103 in words is "fifty-one million, thirty-one thousand, one hundred three".