53447287 has 2 divisors, whose sum is σ = 53447288. Its totient is φ = 53447286.

The previous prime is 53447257. The next prime is 53447327. The reversal of 53447287 is 78274435.

It is an a-pointer prime, because the next prime (53447327) can be obtained adding 53447287 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53447287 - 2⁷ = 53447159 is a prime.

It is a super-2 number, since 2×53447287² = 5713224975320738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53447227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26723643 + 26723644.

It is an arithmetic number, because the mean of its divisors is an integer number (26723644).

Almost surely, 2^53447287 is an apocalyptic number.

53447287 is a deficient number, since it is larger than the sum of its proper divisors (1).

53447287 is an equidigital number, since it uses as much as digits as its factorization.

53447287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 40.

The square root of 53447287 is about 7310.7651446343. The cubic root of 53447287 is about 376.6823071098.

The spelling of 53447287 in words is "fifty-three million, four hundred forty-seven thousand, two hundred eighty-seven".