55085431 has 2 divisors, whose sum is σ = 55085432. Its totient is φ = 55085430.

The previous prime is 55085417. The next prime is 55085441. The reversal of 55085431 is 13458055.

55085431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55085431 - 2⁵ = 55085399 is a prime.

It is a super-2 number, since 2×55085431² = 6068809416911522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55085393 and 55085402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55085411) 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 as a sum of consecutive naturals, namely, 27542715 + 27542716.

It is an arithmetic number, because the mean of its divisors is an integer number (27542716).

Almost surely, 2^55085431 is an apocalyptic number.

55085431 is a deficient number, since it is larger than the sum of its proper divisors (1).

55085431 is an equidigital number, since it uses as much as digits as its factorization.

55085431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 55085431 is about 7421.9560090316. The cubic root of 55085431 is about 380.4920472643.

The spelling of 55085431 in words is "fifty-five million, eighty-five thousand, four hundred thirty-one".