53181416 has 32 divisors (see below), whose sum is σ = 101881800. Its totient is φ = 26019840.

The previous prime is 53181413. The next prime is 53181473. The reversal of 53181416 is 61418135.

It can be written as a sum of positive squares in 4 ways, for example, as 29658916 + 23522500 = 5446^2 + 4850^2 .

It is not an unprimeable number, because it can be changed into a prime (53181413) 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, 80126 + ... + 80786.

Almost surely, 2^53181416 is an apocalyptic number.

It is an amenable number.

53181416 is a deficient number, since it is larger than the sum of its proper divisors (48700384).

53181416 is a wasteful number, since it uses less digits than its factorization.

53181416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 865 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 53181416 is about 7292.5589473106. The cubic root of 53181416 is about 376.0566724596.

The spelling of 53181416 in words is "fifty-three million, one hundred eighty-one thousand, four hundred sixteen".