154223402 has 4 divisors (see below), whose sum is σ = 231335106. Its totient is φ = 77111700.

The previous prime is 154223389. The next prime is 154223429. The reversal of 154223402 is 204322451.

It is a happy number.

154223402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 145467721 + 8755681 = 12061^2 + 2959^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 38555849 + ... + 38555852.

Almost surely, 2^154223402 is an apocalyptic number.

154223402 is a deficient number, since it is larger than the sum of its proper divisors (77111704).

154223402 is an equidigital number, since it uses as much as digits as its factorization.

154223402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77111703.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 154223402 is about 12418.6715070494. The cubic root of 154223402 is about 536.2699061115.

Adding to 154223402 its reverse (204322451), we get a palindrome (358545853).

The spelling of 154223402 in words is "one hundred fifty-four million, two hundred twenty-three thousand, four hundred two".