55547131 has 2 divisors, whose sum is σ = 55547132. Its totient is φ = 55547130.

The previous prime is 55547123. The next prime is 55547153. The reversal of 55547131 is 13174555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55547131 - 2³ = 55547123 is a prime.

It is a super-2 number, since 2×55547131² = 6170967524662322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55547093 and 55547102.

It is not a weakly prime, because it can be changed into another prime (55547111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27773565 + 27773566.

It is an arithmetic number, because the mean of its divisors is an integer number (27773566).

Almost surely, 2^55547131 is an apocalyptic number.

55547131 is a deficient number, since it is larger than the sum of its proper divisors (1).

55547131 is an equidigital number, since it uses as much as digits as its factorization.

55547131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10500, while the sum is 31.

The square root of 55547131 is about 7452.9947672060. The cubic root of 55547131 is about 381.5521257920.

The spelling of 55547131 in words is "fifty-five million, five hundred forty-seven thousand, one hundred thirty-one".