53512404 has 48 divisors (see below), whose sum is σ = 138801600. Its totient is φ = 15907840.

The previous prime is 53512399. The next prime is 53512409. The reversal of 53512404 is 40421535.

It is an interprime number because it is at equal distance from previous prime (53512399) and next prime (53512409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53512409) 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, 3172 + ... + 10820.

It is an arithmetic number, because the mean of its divisors is an integer number (2891700).

Almost surely, 2^53512404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53512404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69400800).

53512404 is an abundant number, since it is smaller than the sum of its proper divisors (85289196).

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

53512404 is a wasteful number, since it uses less digits than its factorization.

53512404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7720 (or 7718 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 53512404 is about 7315.2172900058. The cubic root of 53512404 is about 376.8352208096.

Adding to 53512404 its reverse (40421535), we get a palindrome (93933939).

The spelling of 53512404 in words is "fifty-three million, five hundred twelve thousand, four hundred four".