155864427 has 8 divisors (see below), whose sum is σ = 207918480. Its totient is φ = 103860000.

The previous prime is 155864413. The next prime is 155864437. The reversal of 155864427 is 724468551.

It is a happy number.

155864427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155864427 - 2⁶ = 155864363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155864407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4324 + ... + 18177.

It is an arithmetic number, because the mean of its divisors is an integer number (25989810).

Almost surely, 2^155864427 is an apocalyptic number.

155864427 is a deficient number, since it is larger than the sum of its proper divisors (52054053).

155864427 is a wasteful number, since it uses less digits than its factorization.

155864427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24813.

The product of its digits is 268800, while the sum is 42.

The square root of 155864427 is about 12484.5675535839. The cubic root of 155864427 is about 538.1652719344.

The spelling of 155864427 in words is "one hundred fifty-five million, eight hundred sixty-four thousand, four hundred twenty-seven".