51031443401 has 4 divisors (see below), whose sum is σ = 51032171904. Its totient is φ = 51030714900.

The previous prime is 51031443389. The next prime is 51031443439. The reversal of 51031443401 is 10434413015.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51031443401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51031413401) 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 3 ways as a sum of consecutive naturals, for example, 246485 + ... + 403506.

It is an arithmetic number, because the mean of its divisors is an integer number (12758042976).

Almost surely, 2^51031443401 is an apocalyptic number.

It is an amenable number.

51031443401 is a deficient number, since it is larger than the sum of its proper divisors (728503).

51031443401 is an equidigital number, since it uses as much as digits as its factorization.

51031443401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728502.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 51031443401 its reverse (10434413015), we get a palindrome (61465856416).

The spelling of 51031443401 in words is "fifty-one billion, thirty-one million, four hundred forty-three thousand, four hundred one".