154963221 has 24 divisors (see below), whose sum is σ = 249228864. Its totient is φ = 83885760.

The previous prime is 154963219. The next prime is 154963261. The reversal of 154963221 is 122369451.

It is not a de Polignac number, because 154963221 - 2¹ = 154963219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154963261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2640 + ... + 17801.

It is an arithmetic number, because the mean of its divisors is an integer number (10384536).

Almost surely, 2^154963221 is an apocalyptic number.

It is an amenable number.

154963221 is a deficient number, since it is larger than the sum of its proper divisors (94265643).

154963221 is a wasteful number, since it uses less digits than its factorization.

154963221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20489 (or 20470 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 154963221 is about 12448.4224301716. The cubic root of 154963221 is about 537.1260449904.

The spelling of 154963221 in words is "one hundred fifty-four million, nine hundred sixty-three thousand, two hundred twenty-one".