55103431 has 2 divisors, whose sum is σ = 55103432. Its totient is φ = 55103430.

The previous prime is 55103381. The next prime is 55103437. The reversal of 55103431 is 13430155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55103431 - 2¹¹ = 55101383 is a prime.

It is a super-2 number, since 2×55103431² = 6072776215943522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55103437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27551715 + 27551716.

It is an arithmetic number, because the mean of its divisors is an integer number (27551716).

Almost surely, 2^55103431 is an apocalyptic number.

55103431 is a deficient number, since it is larger than the sum of its proper divisors (1).

55103431 is an equidigital number, since it uses as much as digits as its factorization.

55103431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 55103431 is about 7423.1685283307. The cubic root of 55103431 is about 380.5334866000.

Adding to 55103431 its reverse (13430155), we get a palindrome (68533586).

The spelling of 55103431 in words is "fifty-five million, one hundred three thousand, four hundred thirty-one".