155225732 has 6 divisors (see below), whose sum is σ = 271645038. Its totient is φ = 77612864.

The previous prime is 155225729. The next prime is 155225753. The reversal of 155225732 is 237522551.

It can be written as a sum of positive squares in only one way, i.e., 133079296 + 22146436 = 11536^2 + 4706^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19403213 + ... + 19403220.

It is an arithmetic number, because the mean of its divisors is an integer number (45274173).

Almost surely, 2^155225732 is an apocalyptic number.

It is an amenable number.

155225732 is a deficient number, since it is larger than the sum of its proper divisors (116419306).

155225732 is a wasteful number, since it uses less digits than its factorization.

155225732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38806437 (or 38806435 counting only the distinct ones).

The product of its digits is 21000, while the sum is 32.

The square root of 155225732 is about 12458.9619150233. The cubic root of 155225732 is about 537.4291748756.

The spelling of 155225732 in words is "one hundred fifty-five million, two hundred twenty-five thousand, seven hundred thirty-two".