51225401 has 8 divisors (see below), whose sum is σ = 52400520. Its totient is φ = 50058112.

The previous prime is 51225379. The next prime is 51225431. The reversal of 51225401 is 10452215.

51225401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1155625 + 50069776 = 1075^2 + 7076^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51225401 - 2¹⁸ = 50963257 is a prime.

It is a super-2 number, since 2×51225401² = 5248083415221602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51225431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12461 + ... + 16053.

It is an arithmetic number, because the mean of its divisors is an integer number (6550065).

Almost surely, 2^51225401 is an apocalyptic number.

It is an amenable number.

51225401 is a deficient number, since it is larger than the sum of its proper divisors (1175119).

51225401 is a wasteful number, since it uses less digits than its factorization.

51225401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3915.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 51225401 is about 7157.1922567443. The cubic root of 51225401 is about 371.3885033067.

Adding to 51225401 its reverse (10452215), we get a palindrome (61677616).

The spelling of 51225401 in words is "fifty-one million, two hundred twenty-five thousand, four hundred one".