51372403 has 2 divisors, whose sum is σ = 51372404. Its totient is φ = 51372402.

The previous prime is 51372359. The next prime is 51372469. The reversal of 51372403 is 30427315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51372403 - 2⁹ = 51371891 is a prime.

It is not a weakly prime, because it can be changed into another prime (51372473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25686201 + 25686202.

It is an arithmetic number, because the mean of its divisors is an integer number (25686202).

Almost surely, 2^51372403 is an apocalyptic number.

51372403 is a deficient number, since it is larger than the sum of its proper divisors (1).

51372403 is an equidigital number, since it uses as much as digits as its factorization.

51372403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 51372403 is about 7167.4544295726. The cubic root of 51372403 is about 371.7434230081.

Adding to 51372403 its reverse (30427315), we get a palindrome (81799718).

The spelling of 51372403 in words is "fifty-one million, three hundred seventy-two thousand, four hundred three".