155240913 has 16 divisors (see below), whose sum is σ = 210897216. Its totient is φ = 101547840.

The previous prime is 155240903. The next prime is 155240927. The reversal of 155240913 is 319042551.

It is not a de Polignac number, because 155240913 - 2⁵ = 155240881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155240903) 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 in 15 ways as a sum of consecutive naturals, for example, 101170 + ... + 102692.

It is an arithmetic number, because the mean of its divisors is an integer number (13181076).

Almost surely, 2^155240913 is an apocalyptic number.

It is an amenable number.

155240913 is a deficient number, since it is larger than the sum of its proper divisors (55656303).

155240913 is a wasteful number, since it uses less digits than its factorization.

155240913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 155240913 is about 12459.5711402921. The cubic root of 155240913 is about 537.4466944072.

The spelling of 155240913 in words is "one hundred fifty-five million, two hundred forty thousand, nine hundred thirteen".