55055431 has 2 divisors, whose sum is σ = 55055432. Its totient is φ = 55055430.

The previous prime is 55055419. The next prime is 55055443. The reversal of 55055431 is 13455055.

It is a balanced prime because it is at equal distance from previous prime (55055419) and next prime (55055443).

It is a cyclic number.

It is not a de Polignac number, because 55055431 - 2¹⁹ = 54531143 is a prime.

It is a super-2 number, since 2×55055431² = 6062200965191522, 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 55055431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55055461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27527715 + 27527716.

It is an arithmetic number, because the mean of its divisors is an integer number (27527716).

Almost surely, 2^55055431 is an apocalyptic number.

55055431 is a deficient number, since it is larger than the sum of its proper divisors (1).

55055431 is an equidigital number, since it uses as much as digits as its factorization.

55055431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 55055431 is about 7419.9347032167. The cubic root of 55055431 is about 380.4229616396.

The spelling of 55055431 in words is "fifty-five million, fifty-five thousand, four hundred thirty-one".