155331601 has 16 divisors (see below), whose sum is σ = 168194880. Its totient is φ = 142912000.

The previous prime is 155331563. The next prime is 155331613. The reversal of 155331601 is 106133551.

It is a cyclic number.

It is not a de Polignac number, because 155331601 - 2¹¹ = 155329553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155332601) 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, 251445 + ... + 252061.

It is an arithmetic number, because the mean of its divisors is an integer number (10512180).

Almost surely, 2^155331601 is an apocalyptic number.

It is an amenable number.

155331601 is a deficient number, since it is larger than the sum of its proper divisors (12863279).

155331601 is a wasteful number, since it uses less digits than its factorization.

155331601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 155331601 is about 12463.2098995403. The cubic root of 155331601 is about 537.5513285037.

The spelling of 155331601 in words is "one hundred fifty-five million, three hundred thirty-one thousand, six hundred one".