55691953 has 4 divisors (see below), whose sum is σ = 55937520. Its totient is φ = 55446388.

The previous prime is 55691939. The next prime is 55691957. The reversal of 55691953 is 35919655.

55691953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55691953 - 2¹⁷ = 55560881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55691957) 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 3 ways as a sum of consecutive naturals, for example, 122443 + ... + 122896.

It is an arithmetic number, because the mean of its divisors is an integer number (13984380).

Almost surely, 2^55691953 is an apocalyptic number.

It is an amenable number.

55691953 is a deficient number, since it is larger than the sum of its proper divisors (245567).

55691953 is a wasteful number, since it uses less digits than its factorization.

55691953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245566.

The product of its digits is 182250, while the sum is 43.

The square root of 55691953 is about 7462.7041345614. The cubic root of 55691953 is about 381.8834311683.

It can be divided in two parts, 55691 and 953, that added together give a square (56644 = 238²).

The spelling of 55691953 in words is "fifty-five million, six hundred ninety-one thousand, nine hundred fifty-three".