155263601 has 4 divisors (see below), whose sum is σ = 164396772. Its totient is φ = 146130432.

The previous prime is 155263579. The next prime is 155263613. The reversal of 155263601 is 106362551.

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

It can be written as a sum of positive squares in 2 ways, for example, as 139263601 + 16000000 = 11801^2 + 4000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155263601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155263631) 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, 4566560 + ... + 4566593.

It is an arithmetic number, because the mean of its divisors is an integer number (41099193).

Almost surely, 2^155263601 is an apocalyptic number.

It is an amenable number.

155263601 is a deficient number, since it is larger than the sum of its proper divisors (9133171).

155263601 is an equidigital number, since it uses as much as digits as its factorization.

155263601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9133170.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 155263601 is about 12460.4815717532. The cubic root of 155263601 is about 537.4728752131.

The spelling of 155263601 in words is "one hundred fifty-five million, two hundred sixty-three thousand, six hundred one".