155225752139 has 2 divisors, whose sum is σ = 155225752140. Its totient is φ = 155225752138.

The previous prime is 155225752061. The next prime is 155225752169. The reversal of 155225752139 is 931257522551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155225752139 - 2⁸ = 155225751883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155225752093 and 155225752102.

It is not a weakly prime, because it can be changed into another prime (155225752169) 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, 77612876069 + 77612876070.

It is an arithmetic number, because the mean of its divisors is an integer number (77612876070).

Almost surely, 2^155225752139 is an apocalyptic number.

155225752139 is a deficient number, since it is larger than the sum of its proper divisors (1).

155225752139 is an equidigital number, since it uses as much as digits as its factorization.

155225752139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 945000, while the sum is 47.

The spelling of 155225752139 in words is "one hundred fifty-five billion, two hundred twenty-five million, seven hundred fifty-two thousand, one hundred thirty-nine".