55429819 has 2 divisors, whose sum is σ = 55429820. Its totient is φ = 55429818.

The previous prime is 55429813. The next prime is 55429831. The reversal of 55429819 is 91892455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55429819 - 2⁹ = 55429307 is a prime.

It is a super-2 number, since 2×55429819² = 6144929668745522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55429813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27714909 + 27714910.

It is an arithmetic number, because the mean of its divisors is an integer number (27714910).

Almost surely, 2^55429819 is an apocalyptic number.

55429819 is a deficient number, since it is larger than the sum of its proper divisors (1).

55429819 is an equidigital number, since it uses as much as digits as its factorization.

55429819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 43.

The square root of 55429819 is about 7445.1204825711. The cubic root of 55429819 is about 381.2833318883.

The spelling of 55429819 in words is "fifty-five million, four hundred twenty-nine thousand, eight hundred nineteen".