55452991 has 4 divisors (see below), whose sum is σ = 60494184. Its totient is φ = 50411800.

The previous prime is 55452967. The next prime is 55453007. The reversal of 55452991 is 19925455.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55452991 - 2¹¹ = 55450943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55452941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2520580 + ... + 2520601.

It is an arithmetic number, because the mean of its divisors is an integer number (15123546).

Almost surely, 2^55452991 is an apocalyptic number.

55452991 is a deficient number, since it is larger than the sum of its proper divisors (5041193).

55452991 is a wasteful number, since it uses less digits than its factorization.

55452991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041192.

The product of its digits is 81000, while the sum is 40.

The square root of 55452991 is about 7446.6765070063. The cubic root of 55452991 is about 381.3364553193.

The spelling of 55452991 in words is "fifty-five million, four hundred fifty-two thousand, nine hundred ninety-one".