55631247 has 16 divisors (see below), whose sum is σ = 85847040. Its totient is φ = 31385952.

The previous prime is 55631243. The next prime is 55631249. The reversal of 55631247 is 74213655.

It is not a de Polignac number, because 55631247 - 2² = 55631243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55631243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15108 + ... + 18425.

It is an arithmetic number, because the mean of its divisors is an integer number (5365440).

Almost surely, 2^55631247 is an apocalyptic number.

55631247 is a deficient number, since it is larger than the sum of its proper divisors (30215793).

55631247 is a wasteful number, since it uses less digits than its factorization.

55631247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33622.

The product of its digits is 25200, while the sum is 33.

The square root of 55631247 is about 7458.6357331619. The cubic root of 55631247 is about 381.7446256935.

The spelling of 55631247 in words is "fifty-five million, six hundred thirty-one thousand, two hundred forty-seven".