155224145 has 16 divisors (see below), whose sum is σ = 188825040. Its totient is φ = 122486784.

The previous prime is 155224141. The next prime is 155224159. The reversal of 155224145 is 541422551.

It can be written as a sum of positive squares in 8 ways, for example, as 1067089 + 154157056 = 1033^2 + 12416^2 .

It is a cyclic number.

It is not a de Polignac number, because 155224145 - 2² = 155224141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155224141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144671 + ... + 145739.

It is an arithmetic number, because the mean of its divisors is an integer number (11801565).

Almost surely, 2^155224145 is an apocalyptic number.

It is an amenable number.

155224145 is a deficient number, since it is larger than the sum of its proper divisors (33600895).

155224145 is a wasteful number, since it uses less digits than its factorization.

155224145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444.

The product of its digits is 8000, while the sum is 29.

The square root of 155224145 is about 12458.8982257662. The cubic root of 155224145 is about 537.4273433429.

Adding to 155224145 its reverse (541422551), we get a palindrome (696646696).

The spelling of 155224145 in words is "one hundred fifty-five million, two hundred twenty-four thousand, one hundred forty-five".