154543981 has 8 divisors (see below), whose sum is σ = 156316160. Its totient is φ = 152777232.

The previous prime is 154543979. The next prime is 154544011. The reversal of 154543981 is 189345451.

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 154543981 - 2¹ = 154543979 is a prime.

It is a super-2 number, since 2×154543981² = 47767684126656722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154546981) 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, 86980 + ... + 88738.

It is an arithmetic number, because the mean of its divisors is an integer number (19539520).

Almost surely, 2^154543981 is an apocalyptic number.

It is an amenable number.

154543981 is a deficient number, since it is larger than the sum of its proper divisors (1772179).

154543981 is a wasteful number, since it uses less digits than its factorization.

154543981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715.

The product of its digits is 86400, while the sum is 40.

The square root of 154543981 is about 12431.5719440463. The cubic root of 154543981 is about 536.6412243553.

The spelling of 154543981 in words is "one hundred fifty-four million, five hundred forty-three thousand, nine hundred eighty-one".