155105953 has 2 divisors, whose sum is σ = 155105954. Its totient is φ = 155105952.

The previous prime is 155105939. The next prime is 155105999. The reversal of 155105953 is 359501551.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132181009 + 22924944 = 11497^2 + 4788^2 .

It is a cyclic number.

It is not a de Polignac number, because 155105953 - 2⁵ = 155105921 is a prime.

It is not a weakly prime, because it can be changed into another prime (155105903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77552976 + 77552977.

It is an arithmetic number, because the mean of its divisors is an integer number (77552977).

Almost surely, 2^155105953 is an apocalyptic number.

It is an amenable number.

155105953 is a deficient number, since it is larger than the sum of its proper divisors (1).

155105953 is an equidigital number, since it uses as much as digits as its factorization.

155105953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16875, while the sum is 34.

The square root of 155105953 is about 12454.1540459399. The cubic root of 155105953 is about 537.2909046438.

The spelling of 155105953 in words is "one hundred fifty-five million, one hundred five thousand, nine hundred fifty-three".