154314221 has 4 divisors (see below), whose sum is σ = 154442652. Its totient is φ = 154185792.

The previous prime is 154314211. The next prime is 154314227. The reversal of 154314221 is 122413451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122413451 = 31 ⋅3948821.

It can be written as a sum of positive squares in 2 ways, for example, as 13060996 + 141253225 = 3614^2 + 11885^2 .

It is a cyclic number.

It is not a de Polignac number, because 154314221 - 2¹⁸ = 154052077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154314227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62396 + ... + 64821.

It is an arithmetic number, because the mean of its divisors is an integer number (38610663).

Almost surely, 2^154314221 is an apocalyptic number.

It is an amenable number.

154314221 is a deficient number, since it is larger than the sum of its proper divisors (128431).

154314221 is a wasteful number, since it uses less digits than its factorization.

154314221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128430.

The product of its digits is 960, while the sum is 23.

The square root of 154314221 is about 12422.3275194305. The cubic root of 154314221 is about 536.3751515735.

Adding to 154314221 its reverse (122413451), we get a palindrome (276727672).

The spelling of 154314221 in words is "one hundred fifty-four million, three hundred fourteen thousand, two hundred twenty-one".