155019002 has 4 divisors (see below), whose sum is σ = 232528506. Its totient is φ = 77509500.

The previous prime is 155019001. The next prime is 155019013. The reversal of 155019002 is 200910551.

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

It can be written as a sum of positive squares in only one way, i.e., 143736121 + 11282881 = 11989^2 + 3359^2 .

It is not an unprimeable number, because it can be changed into a prime (155019001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38754749 + ... + 38754752.

Almost surely, 2^155019002 is an apocalyptic number.

155019002 is a deficient number, since it is larger than the sum of its proper divisors (77509504).

155019002 is an equidigital number, since it uses as much as digits as its factorization.

155019002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77509503.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 155019002 is about 12450.6627132856. The cubic root of 155019002 is about 537.1904857298.

Adding to 155019002 its reverse (200910551), we get a palindrome (355929553).

The spelling of 155019002 in words is "one hundred fifty-five million, nineteen thousand, two".