523442500 has 90 divisors (see below), whose sum is σ = 1331859606. Its totient is φ = 179424000.

The previous prime is 523442473. The next prime is 523442501. The reversal of 523442500 is 5244325.

It can be written as a sum of positive squares in 5 ways, for example, as 266930244 + 256512256 = 16338^2 + 16016^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (523442501) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 120364 + ... + 124636.

Almost surely, 2^523442500 is an apocalyptic number.

523442500 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 523442500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (665929803).

523442500 is an abundant number, since it is smaller than the sum of its proper divisors (808417106).

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

523442500 is a wasteful number, since it uses less digits than its factorization.

523442500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311 (or 4287 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 523442500 is about 22878.8657935659. The cubic root of 523442500 is about 805.9157819920.

Adding to 523442500 its reverse (5244325), we get a palindrome (528686825).

The spelling of 523442500 in words is "five hundred twenty-three million, four hundred forty-two thousand, five hundred".