53209992 has 96 divisors (see below), whose sum is σ = 148811040. Its totient is φ = 15840000.

The previous prime is 53209987. The next prime is 53209997. The reversal of 53209992 is 29990235.

It is an interprime number because it is at equal distance from previous prime (53209987) and next prime (53209997).

It is a self number, because there is not a number n which added to its sum of digits gives 53209992.

It is not an unprimeable number, because it can be changed into a prime (53209997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211867 + ... + 212117.

It is an arithmetic number, because the mean of its divisors is an integer number (1550115).

Almost surely, 2^53209992 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 53209992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74405520).

53209992 is an abundant number, since it is smaller than the sum of its proper divisors (95601048).

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

53209992 is a wasteful number, since it uses less digits than its factorization.

53209992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 53209992 is about 7294.5179415778. The cubic root of 53209992 is about 376.1240159798.

The spelling of 53209992 in words is "fifty-three million, two hundred nine thousand, nine hundred ninety-two".