53181012 has 24 divisors (see below), whose sum is σ = 128368800. Its totient is φ = 17115616.

The previous prime is 53181001. The next prime is 53181013. The reversal of 53181012 is 21018135.

It is a self number, because there is not a number n which added to its sum of digits gives 53181012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53181013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76062 + ... + 76757.

It is an arithmetic number, because the mean of its divisors is an integer number (5348700).

Almost surely, 2^53181012 is an apocalyptic number.

It is an amenable number.

53181012 is an abundant number, since it is smaller than the sum of its proper divisors (75187788).

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

53181012 is a wasteful number, since it uses less digits than its factorization.

53181012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152855 (or 152853 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 53181012 is about 7292.5312477904. The cubic root of 53181012 is about 376.0557202016.

Adding to 53181012 its reverse (21018135), we get a palindrome (74199147).

The spelling of 53181012 in words is "fifty-three million, one hundred eighty-one thousand, twelve".