51440103 has 40 divisors (see below), whose sum is σ = 90296976. Its totient is φ = 28771200.

The previous prime is 51440099. The next prime is 51440111. The reversal of 51440103 is 30104415.

It is a happy number.

It is not a de Polignac number, because 51440103 - 2² = 51440099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51440173) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9363 + ... + 13803.

Almost surely, 2^51440103 is an apocalyptic number.

51440103 is a deficient number, since it is larger than the sum of its proper divisors (38856873).

51440103 is a wasteful number, since it uses less digits than its factorization.

51440103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477 (or 4468 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51440103 is about 7172.1756113470. The cubic root of 51440103 is about 371.9066493130.

Adding to 51440103 its reverse (30104415), we get a palindrome (81544518).

The spelling of 51440103 in words is "fifty-one million, four hundred forty thousand, one hundred three".