55919419 has 2 divisors, whose sum is σ = 55919420. Its totient is φ = 55919418.

The previous prime is 55919411. The next prime is 55919441. The reversal of 55919419 is 91491955.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55919419 - 2³ = 55919411 is a prime.

It is a super-2 number, since 2×55919419² = 6253962842595122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55919411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27959709 + 27959710.

It is an arithmetic number, because the mean of its divisors is an integer number (27959710).

Almost surely, 2^55919419 is an apocalyptic number.

55919419 is a deficient number, since it is larger than the sum of its proper divisors (1).

55919419 is an equidigital number, since it uses as much as digits as its factorization.

55919419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 43.

The square root of 55919419 is about 7477.9287907816. The cubic root of 55919419 is about 382.4026414322.

The spelling of 55919419 in words is "fifty-five million, nine hundred nineteen thousand, four hundred nineteen".