51226401 has 4 divisors (see below), whose sum is σ = 68301872. Its totient is φ = 34150932.

The previous prime is 51226393. The next prime is 51226411. The reversal of 51226401 is 10462215.

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 51226401 - 2³ = 51226393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51226411) 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, 8537731 + ... + 8537736.

It is an arithmetic number, because the mean of its divisors is an integer number (17075468).

Almost surely, 2^51226401 is an apocalyptic number.

It is an amenable number.

51226401 is a deficient number, since it is larger than the sum of its proper divisors (17075471).

51226401 is a wasteful number, since it uses less digits than its factorization.

51226401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17075470.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 51226401 is about 7157.2621162006. The cubic root of 51226401 is about 371.3909199859.

Adding to 51226401 its reverse (10462215), we get a palindrome (61688616).

The spelling of 51226401 in words is "fifty-one million, two hundred twenty-six thousand, four hundred one".