55072993 has 8 divisors (see below), whose sum is σ = 55593000. Its totient is φ = 54555648.

The previous prime is 55072987. The next prime is 55072999. The reversal of 55072993 is 39927055.

It is an interprime number because it is at equal distance from previous prime (55072987) and next prime (55072999).

It can be written as a sum of positive squares in 4 ways, for example, as 11881809 + 43191184 = 3447^2 + 6572^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55072993 - 2⁵ = 55072961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55072999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77323 + ... + 78031.

It is an arithmetic number, because the mean of its divisors is an integer number (6949125).

Almost surely, 2^55072993 is an apocalyptic number.

It is an amenable number.

55072993 is a deficient number, since it is larger than the sum of its proper divisors (520007).

55072993 is a wasteful number, since it uses less digits than its factorization.

55072993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 55072993 is about 7421.1180424516. The cubic root of 55072993 is about 380.4634074090.

It can be divided in two parts, 55072 and 993, that added together give a palindrome (56065).

The spelling of 55072993 in words is "fifty-five million, seventy-two thousand, nine hundred ninety-three".