155225768 has 8 divisors (see below), whose sum is σ = 291048330. Its totient is φ = 77612880.

The previous prime is 155225761. The next prime is 155225803. The reversal of 155225768 is 867522551.

It can be written as a sum of positive squares in only one way, i.e., 146942884 + 8282884 = 12122^2 + 2878^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (155225761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9701603 + ... + 9701618.

Almost surely, 2^155225768 is an apocalyptic number.

It is an amenable number.

155225768 is a deficient number, since it is larger than the sum of its proper divisors (135822562).

155225768 is a wasteful number, since it uses less digits than its factorization.

155225768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19403227 (or 19403223 counting only the distinct ones).

The product of its digits is 168000, while the sum is 41.

The square root of 155225768 is about 12458.9633597663. The cubic root of 155225768 is about 537.4292164225.

The spelling of 155225768 in words is "one hundred fifty-five million, two hundred twenty-five thousand, seven hundred sixty-eight".