53191820 has 24 divisors (see below), whose sum is σ = 121858128. Its totient is φ = 19342400.

The previous prime is 53191783. The next prime is 53191837. The reversal of 53191820 is 2819135.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120671 + ... + 121110.

It is an arithmetic number, because the mean of its divisors is an integer number (5077422).

Almost surely, 2^53191820 is an apocalyptic number.

It is an amenable number.

53191820 is an abundant number, since it is smaller than the sum of its proper divisors (68666308).

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

53191820 is a wasteful number, since it uses less digits than its factorization.

53191820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241801 (or 241799 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 53191820 is about 7293.2722422792. The cubic root of 53191820 is about 376.0811937981.

The spelling of 53191820 in words is "fifty-three million, one hundred ninety-one thousand, eight hundred twenty".