51491103 has 8 divisors (see below), whose sum is σ = 68690688. Its totient is φ = 34309464.

The previous prime is 51491101. The next prime is 51491119. The reversal of 51491103 is 30119415.

51491103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51491103 - 2¹ = 51491101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51491101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5200 + ... + 11402.

It is an arithmetic number, because the mean of its divisors is an integer number (8586336).

Almost surely, 2^51491103 is an apocalyptic number.

51491103 is a deficient number, since it is larger than the sum of its proper divisors (17199585).

51491103 is a wasteful number, since it uses less digits than its factorization.

51491103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8973.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 51491103 is about 7175.7301370662. The cubic root of 51491103 is about 372.0295169665.

The spelling of 51491103 in words is "fifty-one million, four hundred ninety-one thousand, one hundred three".