51025401 has 24 divisors (see below), whose sum is σ = 84477120. Its totient is φ = 29072736.

The previous prime is 51025399. The next prime is 51025423. The reversal of 51025401 is 10452015.

Added to its reverse (10452015) it gives a triangular number (61477416 = T₁₁₀₈₈).

It is not a de Polignac number, because 51025401 - 2¹ = 51025399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51025441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25431 + ... + 27363.

It is an arithmetic number, because the mean of its divisors is an integer number (3519880).

Almost surely, 2^51025401 is an apocalyptic number.

It is an amenable number.

51025401 is a deficient number, since it is larger than the sum of its proper divisors (33451719).

51025401 is a wasteful number, since it uses less digits than its factorization.

51025401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2365 (or 2362 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 51025401 is about 7143.2066328785. The cubic root of 51025401 is about 370.9045339137.

Adding to 51025401 its reverse (10452015), we get a palindrome (61477416).

The spelling of 51025401 in words is "fifty-one million, twenty-five thousand, four hundred one".