155550254 has 4 divisors (see below), whose sum is σ = 233325384. Its totient is φ = 77775126.

The previous prime is 155550253. The next prime is 155550259. The reversal of 155550254 is 452055551.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 155550254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155550251) 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, 38887562 + ... + 38887565.

It is an arithmetic number, because the mean of its divisors is an integer number (58331346).

Almost surely, 2^155550254 is an apocalyptic number.

155550254 is a deficient number, since it is larger than the sum of its proper divisors (77775130).

155550254 is an equidigital number, since it uses as much as digits as its factorization.

155550254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77775129.

The product of its (nonzero) digits is 25000, while the sum is 32.

The square root of 155550254 is about 12471.9787523873. The cubic root of 155550254 is about 537.8034388329.

The spelling of 155550254 in words is "one hundred fifty-five million, five hundred fifty thousand, two hundred fifty-four".