154531661 has 8 divisors (see below), whose sum is σ = 156688224. Its totient is φ = 152390160.

The previous prime is 154531631. The next prime is 154531667. The reversal of 154531661 is 166135451.

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

It is a cyclic number.

It is not a de Polignac number, because 154531661 - 2¹⁰ = 154530637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154531667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17735 + ... + 24971.

It is an arithmetic number, because the mean of its divisors is an integer number (19586028).

Almost surely, 2^154531661 is an apocalyptic number.

It is an amenable number.

154531661 is a deficient number, since it is larger than the sum of its proper divisors (2156563).

154531661 is a wasteful number, since it uses less digits than its factorization.

154531661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7531.

The product of its digits is 10800, while the sum is 32.

The square root of 154531661 is about 12431.0764216137. The cubic root of 154531661 is about 536.6269639151.

The spelling of 154531661 in words is "one hundred fifty-four million, five hundred thirty-one thousand, six hundred sixty-one".