155452139 has 2 divisors, whose sum is σ = 155452140. Its totient is φ = 155452138.

The previous prime is 155452051. The next prime is 155452153. The reversal of 155452139 is 931254551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155452139 - 2⁸ = 155451883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155452099 and 155452108.

It is not a weakly prime, because it can be changed into another prime (155452159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77726069 + 77726070.

It is an arithmetic number, because the mean of its divisors is an integer number (77726070).

Almost surely, 2^155452139 is an apocalyptic number.

155452139 is a deficient number, since it is larger than the sum of its proper divisors (1).

155452139 is an equidigital number, since it uses as much as digits as its factorization.

155452139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 35.

The square root of 155452139 is about 12468.0447143889. The cubic root of 155452139 is about 537.6903399440.

The spelling of 155452139 in words is "one hundred fifty-five million, four hundred fifty-two thousand, one hundred thirty-nine".