155243002 has 4 divisors (see below), whose sum is σ = 232864506. Its totient is φ = 77621500.

The previous prime is 155242999. The next prime is 155243017. The reversal of 155243002 is 200342551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200342551 = 257 ⋅779543.

It can be written as a sum of positive squares in only one way, i.e., 102839881 + 52403121 = 10141^2 + 7239^2 .

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, 38810749 + ... + 38810752.

Almost surely, 2^155243002 is an apocalyptic number.

155243002 is a deficient number, since it is larger than the sum of its proper divisors (77621504).

155243002 is an equidigital number, since it uses as much as digits as its factorization.

155243002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77621503.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 155243002 is about 12459.6549711459. The cubic root of 155243002 is about 537.4491051143.

Adding to 155243002 its reverse (200342551), we get a palindrome (355585553).

The spelling of 155243002 in words is "one hundred fifty-five million, two hundred forty-three thousand, two".