154211868 has 18 divisors (see below), whose sum is σ = 389813424. Its totient is φ = 51403944.

The previous prime is 154211867. The next prime is 154211963. The reversal of 154211868 is 868112451.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4283663 = 154211868 / (1 + 5 + 4 + 2 + 1 + 1 + 8 + 6 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154211867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2141796 + ... + 2141867.

Almost surely, 2^154211868 is an apocalyptic number.

154211868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

154211868 is an abundant number, since it is smaller than the sum of its proper divisors (235601556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

154211868 is a wasteful number, since it uses less digits than its factorization.

154211868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4283673 (or 4283668 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 154211868 is about 12418.2071169714. The cubic root of 154211868 is about 536.2565369963.

The spelling of 154211868 in words is "one hundred fifty-four million, two hundred eleven thousand, eight hundred sixty-eight".