51400903 has 4 divisors (see below), whose sum is σ = 51448608. Its totient is φ = 51353200.

The previous prime is 51400901. The next prime is 51400907. The reversal of 51400903 is 30900415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51400903 - 2¹ = 51400901 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51400901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22198 + ... + 24403.

It is an arithmetic number, because the mean of its divisors is an integer number (12862152).

Almost surely, 2^51400903 is an apocalyptic number.

51400903 is a deficient number, since it is larger than the sum of its proper divisors (47705).

51400903 is a wasteful number, since it uses less digits than its factorization.

51400903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47704.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 51400903 is about 7169.4423074602. The cubic root of 51400903 is about 371.8121546508.

The spelling of 51400903 in words is "fifty-one million, four hundred thousand, nine hundred three".