155243601 has 16 divisors (see below), whose sum is σ = 236208000. Its totient is φ = 100697904.

The previous prime is 155243587. The next prime is 155243617. The reversal of 155243601 is 106342551.

155243601 is a `hidden beast` number, since 1 + 5 + 52 + 4 + 3 + 601 = 666.

It is not a de Polignac number, because 155243601 - 2⁹ = 155243089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (155243651) 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, 76701 + ... + 78698.

It is an arithmetic number, because the mean of its divisors is an integer number (14763000).

Almost surely, 2^155243601 is an apocalyptic number.

It is an amenable number.

155243601 is a deficient number, since it is larger than the sum of its proper divisors (80964399).

155243601 is a wasteful number, since it uses less digits than its factorization.

155243601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155445 (or 155439 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 155243601 is about 12459.6790087064. The cubic root of 155243601 is about 537.4497963566.

The spelling of 155243601 in words is "one hundred fifty-five million, two hundred forty-three thousand, six hundred one".