51403431523 has 2 divisors, whose sum is σ = 51403431524. Its totient is φ = 51403431522.

The previous prime is 51403431487. The next prime is 51403431533. The reversal of 51403431523 is 32513430415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51403431523 - 2²¹ = 51401334371 is a prime.

It is not a weakly prime, because it can be changed into another prime (51403431533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25701715761 + 25701715762.

It is an arithmetic number, because the mean of its divisors is an integer number (25701715762).

Almost surely, 2^51403431523 is an apocalyptic number.

51403431523 is a deficient number, since it is larger than the sum of its proper divisors (1).

51403431523 is an equidigital number, since it uses as much as digits as its factorization.

51403431523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 51403431523 its reverse (32513430415), we get a palindrome (83916861938).

The spelling of 51403431523 in words is "fifty-one billion, four hundred three million, four hundred thirty-one thousand, five hundred twenty-three".