155225444 has 12 divisors (see below), whose sum is σ = 296339568. Its totient is φ = 70557000.

The previous prime is 155225417. The next prime is 155225479. The reversal of 155225444 is 444522551.

It is a self number, because there is not a number n which added to its sum of digits gives 155225444.

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, 1763882 + ... + 1763969.

It is an arithmetic number, because the mean of its divisors is an integer number (24694964).

Almost surely, 2^155225444 is an apocalyptic number.

It is an amenable number.

155225444 is a deficient number, since it is larger than the sum of its proper divisors (141114124).

155225444 is a wasteful number, since it uses less digits than its factorization.

155225444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3527866 (or 3527864 counting only the distinct ones).

The product of its digits is 32000, while the sum is 32.

The square root of 155225444 is about 12458.9503570726. The cubic root of 155225444 is about 537.4288425001.

Adding to 155225444 its reverse (444522551), we get a palindrome (599747995).

The spelling of 155225444 in words is "one hundred fifty-five million, two hundred twenty-five thousand, four hundred forty-four".