155240743 has 8 divisors (see below), whose sum is σ = 179046560. Its totient is φ = 131842080.

The previous prime is 155240717. The next prime is 155240783. The reversal of 155240743 is 347042551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155240743 - 2¹⁷ = 155109671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155240713) 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 7 ways as a sum of consecutive naturals, for example, 100968 + ... + 102493.

It is an arithmetic number, because the mean of its divisors is an integer number (22380820).

Almost surely, 2^155240743 is an apocalyptic number.

155240743 is a deficient number, since it is larger than the sum of its proper divisors (23805817).

155240743 is a wasteful number, since it uses less digits than its factorization.

155240743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203577.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 155240743 is about 12459.5643182256. The cubic root of 155240743 is about 537.4464982262.

The spelling of 155240743 in words is "one hundred fifty-five million, two hundred forty thousand, seven hundred forty-three".