55271431 has 2 divisors, whose sum is σ = 55271432. Its totient is φ = 55271430.

The previous prime is 55271423. The next prime is 55271467. The reversal of 55271431 is 13417255.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55271431 - 2³ = 55271423 is a prime.

It is a super-2 number, since 2×55271431² = 6109862169575522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55271431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55271831) 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 as a sum of consecutive naturals, namely, 27635715 + 27635716.

It is an arithmetic number, because the mean of its divisors is an integer number (27635716).

Almost surely, 2^55271431 is an apocalyptic number.

55271431 is a deficient number, since it is larger than the sum of its proper divisors (1).

55271431 is an equidigital number, since it uses as much as digits as its factorization.

55271431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 28.

The square root of 55271431 is about 7434.4758389546. The cubic root of 55271431 is about 380.9198192633.

Adding to 55271431 its reverse (13417255), we get a palindrome (68688686).

The spelling of 55271431 in words is "fifty-five million, two hundred seventy-one thousand, four hundred thirty-one".