155288542 has 4 divisors (see below), whose sum is σ = 232932816. Its totient is φ = 77644270.

The previous prime is 155288537. The next prime is 155288563. The reversal of 155288542 is 245882551.

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

It is a super-2 number, since 2×155288542² = 48229062552971528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 155288495 and 155288504.

It is a congruent number.

It is an unprimeable number.

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, 38822134 + ... + 38822137.

It is an arithmetic number, because the mean of its divisors is an integer number (58233204).

Almost surely, 2^155288542 is an apocalyptic number.

155288542 is a deficient number, since it is larger than the sum of its proper divisors (77644274).

155288542 is an equidigital number, since it uses as much as digits as its factorization.

155288542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77644273.

The product of its digits is 128000, while the sum is 40.

The square root of 155288542 is about 12461.4823355811. The cubic root of 155288542 is about 537.5016529244.

The spelling of 155288542 in words is "one hundred fifty-five million, two hundred eighty-eight thousand, five hundred forty-two".