154742222 has 4 divisors (see below), whose sum is σ = 232113336. Its totient is φ = 77371110.

The previous prime is 154742219. The next prime is 154742227. The reversal of 154742222 is 222247451.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154742227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38685554 + ... + 38685557.

It is an arithmetic number, because the mean of its divisors is an integer number (58028334).

Almost surely, 2^154742222 is an apocalyptic number.

154742222 is a deficient number, since it is larger than the sum of its proper divisors (77371114).

154742222 is an equidigital number, since it uses as much as digits as its factorization.

154742222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77371113.

The product of its digits is 8960, while the sum is 29.

The square root of 154742222 is about 12439.5426764813. The cubic root of 154742222 is about 536.8705848186.

Adding to 154742222 its reverse (222247451), we get a palindrome (376989673).

The spelling of 154742222 in words is "one hundred fifty-four million, seven hundred forty-two thousand, two hundred twenty-two".