154742531 has 2 divisors, whose sum is σ = 154742532. Its totient is φ = 154742530.

The previous prime is 154742513. The next prime is 154742537. The reversal of 154742531 is 135247451.

Together with previous prime (154742513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154742531 - 2¹⁴ = 154726147 is a prime.

It is a super-2 number, since 2×154742531² = 47890501800571922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154742537) 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, 77371265 + 77371266.

It is an arithmetic number, because the mean of its divisors is an integer number (77371266).

Almost surely, 2^154742531 is an apocalyptic number.

154742531 is a deficient number, since it is larger than the sum of its proper divisors (1).

154742531 is an equidigital number, since it uses as much as digits as its factorization.

154742531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 32.

The square root of 154742531 is about 12439.5550965459. Note that the first 3 decimals coincide. The cubic root of 154742531 is about 536.8709421718.

Adding to 154742531 its reverse (135247451), we get a palindrome (289989982).

The spelling of 154742531 in words is "one hundred fifty-four million, seven hundred forty-two thousand, five hundred thirty-one".