155021164 has 24 divisors (see below), whose sum is σ = 294256368. Its totient is φ = 71170560.

The previous prime is 155021161. The next prime is 155021177. The reversal of 155021164 is 461120551.

It is a happy number.

It is a super-2 number, since 2×155021164² = 48063122575829792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155021161) 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 7 ways as a sum of consecutive naturals, for example, 25014 + ... + 30589.

It is an arithmetic number, because the mean of its divisors is an integer number (12260682).

Almost surely, 2^155021164 is an apocalyptic number.

It is an amenable number.

155021164 is a deficient number, since it is larger than the sum of its proper divisors (139235204).

155021164 is a wasteful number, since it uses less digits than its factorization.

155021164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55665 (or 55663 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 155021164 is about 12450.7495356705. The cubic root of 155021164 is about 537.1929830590.

The spelling of 155021164 in words is "one hundred fifty-five million, twenty-one thousand, one hundred sixty-four".