155028667 has 4 divisors (see below), whose sum is σ = 158809896. Its totient is φ = 151247440.

The previous prime is 155028611. The next prime is 155028673. The reversal of 155028667 is 766820551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155028667 - 2⁷ = 155028539 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155028677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1890553 + ... + 1890634.

It is an arithmetic number, because the mean of its divisors is an integer number (39702474).

Almost surely, 2^155028667 is an apocalyptic number.

155028667 is a deficient number, since it is larger than the sum of its proper divisors (3781229).

155028667 is an equidigital number, since it uses as much as digits as its factorization.

155028667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781228.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 155028667 is about 12451.0508391862. The cubic root of 155028667 is about 537.2016496045.

The spelling of 155028667 in words is "one hundred fifty-five million, twenty-eight thousand, six hundred sixty-seven".