55611731 has 4 divisors (see below), whose sum is σ = 63556272. Its totient is φ = 47667192.

The previous prime is 55611719. The next prime is 55611757. The reversal of 55611731 is 13711655.

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 55611731 - 2⁶ = 55611667 is a prime.

It is a super-2 number, since 2×55611731² = 6185329249632722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55611694 and 55611703.

It is not an unprimeable number, because it can be changed into a prime (55611701) 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 3 ways as a sum of consecutive naturals, for example, 3972260 + ... + 3972273.

It is an arithmetic number, because the mean of its divisors is an integer number (15889068).

Almost surely, 2^55611731 is an apocalyptic number.

55611731 is a deficient number, since it is larger than the sum of its proper divisors (7944541).

55611731 is an equidigital number, since it uses as much as digits as its factorization.

55611731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7944540.

The product of its digits is 3150, while the sum is 29.

The square root of 55611731 is about 7457.3273362512. The cubic root of 55611731 is about 381.6999805232.

The spelling of 55611731 in words is "fifty-five million, six hundred eleven thousand, seven hundred thirty-one".