253531604 has 12 divisors (see below), whose sum is σ = 444025428. Its totient is φ = 126667200.

The previous prime is 253531571. The next prime is 253531631. The reversal of 253531604 is 406135352.

It can be written as a sum of positive squares in 2 ways, for example, as 158508100 + 95023504 = 12590^2 + 9748^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18707 + ... + 29274.

It is an arithmetic number, because the mean of its divisors is an integer number (37002119).

Almost surely, 2^253531604 is an apocalyptic number.

It is an amenable number.

253531604 is a deficient number, since it is larger than the sum of its proper divisors (190493824).

253531604 is a wasteful number, since it uses less digits than its factorization.

253531604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49306 (or 49304 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 253531604 is about 15922.6757801571. The cubic root of 253531604 is about 632.9130270077.

Adding to 253531604 its reverse (406135352), we get a palindrome (659666956).

The spelling of 253531604 in words is "two hundred fifty-three million, five hundred thirty-one thousand, six hundred four".