53312247 has 12 divisors (see below), whose sum is σ = 77481144. Its totient is φ = 35322480.

The previous prime is 53312243. The next prime is 53312263. The reversal of 53312247 is 74221335.

53312247 is a `hidden beast` number, since 533 + 122 + 4 + 7 = 666.

It is not a de Polignac number, because 53312247 - 2² = 53312243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53312247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53312243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16704 + ... + 19637.

It is an arithmetic number, because the mean of its divisors is an integer number (6456762).

Almost surely, 2^53312247 is an apocalyptic number.

53312247 is a deficient number, since it is larger than the sum of its proper divisors (24168897).

53312247 is a wasteful number, since it uses less digits than its factorization.

53312247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36510 (or 36507 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 53312247 is about 7301.5236081245. The cubic root of 53312247 is about 376.3647975148.

The spelling of 53312247 in words is "fifty-three million, three hundred twelve thousand, two hundred forty-seven".