155814009 has 8 divisors (see below), whose sum is σ = 223732992. Its totient is φ = 95885520.

The previous prime is 155813963. The next prime is 155814017. The reversal of 155814009 is 900418551.

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

It is not a de Polignac number, because 155814009 - 2⁷ = 155813881 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155814019) 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, 1997577 + ... + 1997654.

It is an arithmetic number, because the mean of its divisors is an integer number (27966624).

Almost surely, 2^155814009 is an apocalyptic number.

It is an amenable number.

155814009 is a deficient number, since it is larger than the sum of its proper divisors (67918983).

155814009 is a wasteful number, since it uses less digits than its factorization.

155814009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3995247.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 155814009 is about 12482.5481773555. The cubic root of 155814009 is about 538.1072382887.

The spelling of 155814009 in words is "one hundred fifty-five million, eight hundred fourteen thousand, nine".