155623144 has 16 divisors (see below), whose sum is σ = 291942720. Its totient is φ = 77771760.

The previous prime is 155623121. The next prime is 155623159. The reversal of 155623144 is 441326551.

It is a happy number.

155623144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17727 + ... + 25009.

It is an arithmetic number, because the mean of its divisors is an integer number (18246420).

Almost surely, 2^155623144 is an apocalyptic number.

It is an amenable number.

155623144 is a deficient number, since it is larger than the sum of its proper divisors (136319576).

155623144 is a wasteful number, since it uses less digits than its factorization.

155623144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9960 (or 9956 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 155623144 is about 12474.9005607259. The cubic root of 155623144 is about 537.8874296337.

Adding to 155623144 its reverse (441326551), we get a palindrome (596949695).

The spelling of 155623144 in words is "one hundred fifty-five million, six hundred twenty-three thousand, one hundred forty-four".