53531000 has 64 divisors (see below), whose sum is σ = 126360000. Its totient is φ = 21225600.

The previous prime is 53530957. The next prime is 53531003. The reversal of 53531000 is 13535.

It is a super-2 number, since 2×53531000² = 5731135922000000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53531000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53531003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198866 + ... + 199134.

It is an arithmetic number, because the mean of its divisors is an integer number (1974375).

Almost surely, 2^53531000 is an apocalyptic number.

53531000 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 53531000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63180000).

53531000 is an abundant number, since it is smaller than the sum of its proper divisors (72829000).

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

53531000 is a wasteful number, since it uses less digits than its factorization.

53531000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 53531000 is about 7316.4882286518. The cubic root of 53531000 is about 376.8788668659.

Adding to 53531000 its reverse (13535), we get a palindrome (53544535).

The spelling of 53531000 in words is "fifty-three million, five hundred thirty-one thousand".