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55629281 = 711315981

55629281 has 8 divisors (see below), whose sum is σ = 56852928. Its totient is φ = 54418000.

The previous prime is 55629269. The next prime is 55629293. The reversal of 55629281 is 18292655.

55629281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55629269) and next prime (55629293).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-55629281 is a prime.

It is a super-2 number, since 2×556292812 = 6189233809153922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55629481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6311 + ... + 12291.

It is an arithmetic number, because the mean of its divisors is an integer number (7106616).

Almost surely, 255629281 is an apocalyptic number.

It is an amenable number.

55629281 is a deficient number, since it is larger than the sum of its proper divisors (1223647).

55629281 is a wasteful number, since it uses less digits than its factorization.

55629281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6183.

The product of its digits is 43200, while the sum is 38.

The square root of 55629281 is about 7458.5039384584. The cubic root of 55629281 is about 381.7401287077.

The spelling of 55629281 in words is "fifty-five million, six hundred twenty-nine thousand, two hundred eighty-one".

Divisors: 1 71 131 5981 9301 424651 783511 55629281