51030252 has 144 divisors (see below), whose sum is σ = 163438912. Its totient is φ = 13063680.

The previous prime is 51030233. The next prime is 51030263. The reversal of 51030252 is 25203015.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121002 + ... + 121422.

Almost surely, 2^51030252 is an apocalyptic number.

51030252 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51030252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81719456).

51030252 is an abundant number, since it is smaller than the sum of its proper divisors (112408660).

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

51030252 is a wasteful number, since it uses less digits than its factorization.

51030252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 51030252 is about 7143.5461781947. The cubic root of 51030252 is about 370.9162875426.

Adding to 51030252 its reverse (25203015), we get a palindrome (76233267).

The spelling of 51030252 in words is "fifty-one million, thirty thousand, two hundred fifty-two".