155601651 has 4 divisors (see below), whose sum is σ = 207468872. Its totient is φ = 103734432.

The previous prime is 155601643. The next prime is 155601653. The reversal of 155601651 is 156106551.

155601651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 155601651 - 2³ = 155601643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155601653) 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, 25933606 + ... + 25933611.

It is an arithmetic number, because the mean of its divisors is an integer number (51867218).

Almost surely, 2^155601651 is an apocalyptic number.

155601651 is a deficient number, since it is larger than the sum of its proper divisors (51867221).

155601651 is an equidigital number, since it uses as much as digits as its factorization.

155601651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51867220.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 155601651 is about 12474.0390812279. The cubic root of 155601651 is about 537.8626660788.

The spelling of 155601651 in words is "one hundred fifty-five million, six hundred one thousand, six hundred fifty-one".