201523604 has 12 divisors (see below), whose sum is σ = 353003700. Its totient is φ = 100665408.

The previous prime is 201523603. The next prime is 201523613. The reversal of 201523604 is 406325102.

It can be written as a sum of positive squares in 2 ways, for example, as 28601104 + 172922500 = 5348^2 + 13150^2 .

It is a super-2 number, since 2×201523604² = 81223525938297632, 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 201523604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201523603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19289 + ... + 27840.

It is an arithmetic number, because the mean of its divisors is an integer number (29416975).

Almost surely, 2^201523604 is an apocalyptic number.

It is an amenable number.

201523604 is a deficient number, since it is larger than the sum of its proper divisors (151480096).

201523604 is a wasteful number, since it uses less digits than its factorization.

201523604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48202 (or 48200 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 201523604 is about 14195.9009576708. The cubic root of 201523604 is about 586.2848076041.

Adding to 201523604 its reverse (406325102), we get a palindrome (607848706).

The spelling of 201523604 in words is "two hundred one million, five hundred twenty-three thousand, six hundred four".