154940551 has 2 divisors, whose sum is σ = 154940552. Its totient is φ = 154940550.

The previous prime is 154940521. The next prime is 154940563. The reversal of 154940551 is 155049451.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154940551 - 2⁹ = 154940039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154940501) 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, 77470275 + 77470276.

It is an arithmetic number, because the mean of its divisors is an integer number (77470276).

Almost surely, 2^154940551 is an apocalyptic number.

154940551 is a deficient number, since it is larger than the sum of its proper divisors (1).

154940551 is an equidigital number, since it uses as much as digits as its factorization.

154940551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 154940551 is about 12447.5118397212. The cubic root of 154940551 is about 537.0998511594.

Subtracting 154940551 from its reverse (155049451), we obtain a square (108900 = 330²).

The spelling of 154940551 in words is "one hundred fifty-four million, nine hundred forty thousand, five hundred fifty-one".