51423500403 has 16 divisors (see below), whose sum is σ = 83108688000. Its totient is φ = 31165757640.

The previous prime is 51423500369. The next prime is 51423500407. The reversal of 51423500403 is 30400532415.

It is not a de Polignac number, because 51423500403 - 2⁶ = 51423500339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51423500407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86571253 + ... + 86571846.

It is an arithmetic number, because the mean of its divisors is an integer number (5194293000).

Almost surely, 2^51423500403 is an apocalyptic number.

51423500403 is a deficient number, since it is larger than the sum of its proper divisors (31685187597).

51423500403 is a wasteful number, since it uses less digits than its factorization.

51423500403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173143119 (or 173143113 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The spelling of 51423500403 in words is "fifty-one billion, four hundred twenty-three million, five hundred thousand, four hundred three".