155150639 has 4 divisors (see below), whose sum is σ = 177315024. Its totient is φ = 132986256.

The previous prime is 155150591. The next prime is 155150647. The reversal of 155150639 is 936051551.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 155150639 - 2¹⁶ = 155085103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155150599 and 155150608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155150659) 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 in 3 ways as a sum of consecutive naturals, for example, 11082182 + ... + 11082195.

It is an arithmetic number, because the mean of its divisors is an integer number (44328756).

Almost surely, 2^155150639 is an apocalyptic number.

155150639 is a deficient number, since it is larger than the sum of its proper divisors (22164385).

155150639 is an equidigital number, since it uses as much as digits as its factorization.

155150639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22164384.

The product of its (nonzero) digits is 20250, while the sum is 35.

The square root of 155150639 is about 12455.9479366285. The cubic root of 155150639 is about 537.3424974971.

The spelling of 155150639 in words is "one hundred fifty-five million, one hundred fifty thousand, six hundred thirty-nine".