53212500 has 216 divisors, whose sum is σ = 187675488. Its totient is φ = 12600000.

The previous prime is 53212487. The next prime is 53212529. The reversal of 53212500 is 521235.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1237479 + ... + 1237521.

It is an arithmetic number, because the mean of its divisors is an integer number (868868).

Almost surely, 2^53212500 is an apocalyptic number.

53212500 is a gapful number since it is divisible by the number (50) 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 53212500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93837744).

53212500 is an abundant number, since it is smaller than the sum of its proper divisors (134462988).

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

53212500 is a wasteful number, since it uses less digits than its factorization.

53212500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 64 counting only the distinct ones).

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

The square root of 53212500 is about 7294.6898494727. The cubic root of 53212500 is about 376.1299252973.

Adding to 53212500 its reverse (521235), we get a palindrome (53733735).

The spelling of 53212500 in words is "fifty-three million, two hundred twelve thousand, five hundred".