154857553 has 2 divisors, whose sum is σ = 154857554. Its totient is φ = 154857552.

The previous prime is 154857517. The next prime is 154857557. The reversal of 154857553 is 355758451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114318864 + 40538689 = 10692^2 + 6367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154857553 is a prime.

It is a super-2 number, since 2×154857553² = 47961723442295618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154857557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77428776 + 77428777.

It is an arithmetic number, because the mean of its divisors is an integer number (77428777).

Almost surely, 2^154857553 is an apocalyptic number.

It is an amenable number.

154857553 is a deficient number, since it is larger than the sum of its proper divisors (1).

154857553 is an equidigital number, since it uses as much as digits as its factorization.

154857553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420000, while the sum is 43.

The square root of 154857553 is about 12444.1774738228. The cubic root of 154857553 is about 537.0039301209.

The spelling of 154857553 in words is "one hundred fifty-four million, eight hundred fifty-seven thousand, five hundred fifty-three".