51211150421 has 8 divisors (see below), whose sum is σ = 54225547200. Its totient is φ = 48196973248.

The previous prime is 51211150399. The next prime is 51211150423. The reversal of 51211150421 is 12405111215.

It is a happy number.

51211150421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51211150421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51211150423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889880 + ... + 945678.

It is an arithmetic number, because the mean of its divisors is an integer number (6778193400).

Almost surely, 2^51211150421 is an apocalyptic number.

It is an amenable number.

51211150421 is a deficient number, since it is larger than the sum of its proper divisors (3014396779).

51211150421 is a wasteful number, since it uses less digits than its factorization.

51211150421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109803.

The product of its (nonzero) digits is 400, while the sum is 23.

Adding to 51211150421 its reverse (12405111215), we get a palindrome (63616261636).

The spelling of 51211150421 in words is "fifty-one billion, two hundred eleven million, one hundred fifty thousand, four hundred twenty-one".