280149155 has 16 divisors (see below), whose sum is σ = 394952544. Its totient is φ = 188071680.

The previous prime is 280149151. The next prime is 280149157. The reversal of 280149155 is 551941082.

It is not a de Polignac number, because 280149155 - 2² = 280149151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280149151) 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, 195194 + ... + 196623.

It is an arithmetic number, because the mean of its divisors is an integer number (24684534).

Almost surely, 2^280149155 is an apocalyptic number.

280149155 is a deficient number, since it is larger than the sum of its proper divisors (114803389).

280149155 is a wasteful number, since it uses less digits than its factorization.

280149155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391846.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 280149155 is about 16737.6567953821. The cubic root of 280149155 is about 654.3294071062.

The spelling of 280149155 in words is "two hundred eighty million, one hundred forty-nine thousand, one hundred fifty-five".