51004240401 has 4 divisors (see below), whose sum is σ = 68005653872. Its totient is φ = 34002826932.

The previous prime is 51004240363. The next prime is 51004240423. The reversal of 51004240401 is 10404240015.

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 not a de Polignac number, because 51004240401 - 2¹¹ = 51004238353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51004240501) 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, 8500706731 + ... + 8500706736.

It is an arithmetic number, because the mean of its divisors is an integer number (17001413468).

Almost surely, 2^51004240401 is an apocalyptic number.

It is an amenable number.

51004240401 is a deficient number, since it is larger than the sum of its proper divisors (17001413471).

51004240401 is a wasteful number, since it uses less digits than its factorization.

51004240401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17001413470.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 51004240401 its reverse (10404240015), we get a palindrome (61408480416).

The spelling of 51004240401 in words is "fifty-one billion, four million, two hundred forty thousand, four hundred one".