155225644 has 24 divisors (see below), whose sum is σ = 310722048. Its totient is φ = 66467280.

The previous prime is 155225641. The next prime is 155225659. The reversal of 155225644 is 446522551.

It is not an unprimeable number, because it can be changed into a prime (155225641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50907 + ... + 53869.

It is an arithmetic number, because the mean of its divisors is an integer number (12946752).

Almost surely, 2^155225644 is an apocalyptic number.

155225644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

155225644 is an abundant number, since it is smaller than the sum of its proper divisors (155496404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155225644 is a wasteful number, since it uses less digits than its factorization.

155225644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4845 (or 4843 counting only the distinct ones).

The product of its digits is 48000, while the sum is 34.

The square root of 155225644 is about 12458.9583834284. The cubic root of 155225644 is about 537.4290733165.

The spelling of 155225644 in words is "one hundred fifty-five million, two hundred twenty-five thousand, six hundred forty-four".