155381469 has 4 divisors (see below), whose sum is σ = 207175296. Its totient is φ = 103587644.

The previous prime is 155381467. The next prime is 155381497. The reversal of 155381469 is 964183551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 964183551 = 3 ⋅321394517.

It is a cyclic number.

It is not a de Polignac number, because 155381469 - 2¹ = 155381467 is a prime.

It is a super-2 number, since 2×155381469² = 48286801817195922, 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 155381469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155381461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25896909 + ... + 25896914.

It is an arithmetic number, because the mean of its divisors is an integer number (51793824).

Almost surely, 2^155381469 is an apocalyptic number.

It is an amenable number.

155381469 is a deficient number, since it is larger than the sum of its proper divisors (51793827).

155381469 is an equidigital number, since it uses as much as digits as its factorization.

155381469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51793826.

The product of its digits is 129600, while the sum is 42.

The square root of 155381469 is about 12465.2103472023. The cubic root of 155381469 is about 537.6088479037.

The spelling of 155381469 in words is "one hundred fifty-five million, three hundred eighty-one thousand, four hundred sixty-nine".