51262530 has 64 divisors (see below), whose sum is σ = 138571776. Its totient is φ = 12024000.

The previous prime is 51262529. The next prime is 51262559. The reversal of 51262530 is 3526215.

It is a self number, because there is not a number n which added to its sum of digits gives 51262530.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7725 + ... + 12735.

It is an arithmetic number, because the mean of its divisors is an integer number (2165184).

Almost surely, 2^51262530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51262530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69285888).

51262530 is an abundant number, since it is smaller than the sum of its proper divisors (87309246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51262530 is a wasteful number, since it uses less digits than its factorization.

51262530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5063.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 51262530 is about 7159.7856113155. The cubic root of 51262530 is about 371.4782111030.

Adding to 51262530 its reverse (3526215), we get a palindrome (54788745).

The spelling of 51262530 in words is "fifty-one million, two hundred sixty-two thousand, five hundred thirty".