154221953 has 2 divisors, whose sum is σ = 154221954. Its totient is φ = 154221952.

The previous prime is 154221937. The next prime is 154221973. The reversal of 154221953 is 359122451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144192064 + 10029889 = 12008^2 + 3167^2 .

It is a cyclic number.

It is not a de Polignac number, because 154221953 - 2⁴ = 154221937 is a prime.

It is not a weakly prime, because it can be changed into another prime (154221973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77110976 + 77110977.

It is an arithmetic number, because the mean of its divisors is an integer number (77110977).

Almost surely, 2^154221953 is an apocalyptic number.

It is an amenable number.

154221953 is a deficient number, since it is larger than the sum of its proper divisors (1).

154221953 is an equidigital number, since it uses as much as digits as its factorization.

154221953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 154221953 is about 12418.6131673388. The cubic root of 154221953 is about 536.2682266052.

The spelling of 154221953 in words is "one hundred fifty-four million, two hundred twenty-one thousand, nine hundred fifty-three".