155009419 has 4 divisors (see below), whose sum is σ = 155060080. Its totient is φ = 154958760.

The previous prime is 155009399. The next prime is 155009473. The reversal of 155009419 is 914900551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155009419 - 2¹³ = 155001227 is a prime.

It is a super-2 number, since 2×155009419² = 48055839957435122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155009119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20424 + ... + 26965.

It is an arithmetic number, because the mean of its divisors is an integer number (38765020).

Almost surely, 2^155009419 is an apocalyptic number.

155009419 is a deficient number, since it is larger than the sum of its proper divisors (50661).

155009419 is an equidigital number, since it uses as much as digits as its factorization.

155009419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50660.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 155009419 is about 12450.2778683851. The cubic root of 155009419 is about 537.1794161137.

The spelling of 155009419 in words is "one hundred fifty-five million, nine thousand, four hundred nineteen".