51025402 has 24 divisors (see below), whose sum is σ = 80487036. Its totient is φ = 24240000.

The previous prime is 51025399. The next prime is 51025423. The reversal of 51025402 is 20452015.

It can be written as a sum of positive squares in 6 ways, for example, as 25613721 + 25411681 = 5061^2 + 5041^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51025402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 505152 + ... + 505252.

Almost surely, 2^51025402 is an apocalyptic number.

51025402 is a deficient number, since it is larger than the sum of its proper divisors (29461634).

51025402 is a wasteful number, since it uses less digits than its factorization.

51025402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 51025402 is about 7143.2067028751. The cubic root of 51025402 is about 370.9045363367.

Adding to 51025402 its reverse (20452015), we get a palindrome (71477417).

The spelling of 51025402 in words is "fifty-one million, twenty-five thousand, four hundred two".