55213843 has 2 divisors, whose sum is σ = 55213844. Its totient is φ = 55213842.

The previous prime is 55213831. The next prime is 55213853. The reversal of 55213843 is 34831255.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55213843 - 2²¹ = 53116691 is a prime.

It is not a weakly prime, because it can be changed into another prime (55213853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27606921 + 27606922.

It is an arithmetic number, because the mean of its divisors is an integer number (27606922).

Almost surely, 2^55213843 is an apocalyptic number.

55213843 is a deficient number, since it is larger than the sum of its proper divisors (1).

55213843 is an equidigital number, since it uses as much as digits as its factorization.

55213843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

The square root of 55213843 is about 7430.6017925872. The cubic root of 55213843 is about 380.7874782378.

The spelling of 55213843 in words is "fifty-five million, two hundred thirteen thousand, eight hundred forty-three".