154221543402 has 16 divisors (see below), whose sum is σ = 308454078240. Its totient is φ = 51405349232.

The previous prime is 154221543361. The next prime is 154221543409. The reversal of 154221543402 is 204345122451.

It is not an unprimeable number, because it can be changed into a prime (154221543409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269613 + ... + 617360.

It is an arithmetic number, because the mean of its divisors is an integer number (19278379890).

Almost surely, 2^154221543402 is an apocalyptic number.

154221543402 is an abundant number, since it is smaller than the sum of its proper divisors (154232534838).

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

154221543402 is a wasteful number, since it uses less digits than its factorization.

154221543402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915957.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 154221543402 its reverse (204345122451), we get a palindrome (358566665853).

The spelling of 154221543402 in words is "one hundred fifty-four billion, two hundred twenty-one million, five hundred forty-three thousand, four hundred two".