155431241 has 16 divisors (see below), whose sum is σ = 184086528. Its totient is φ = 128422800.

The previous prime is 155431201. The next prime is 155431247. The reversal of 155431241 is 142134551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155431241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155431241.

It is not an unprimeable number, because it can be changed into a prime (155431247) 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, 60146 + ... + 62676.

It is an arithmetic number, because the mean of its divisors is an integer number (11505408).

Almost surely, 2^155431241 is an apocalyptic number.

It is an amenable number.

155431241 is a deficient number, since it is larger than the sum of its proper divisors (28655287).

155431241 is a wasteful number, since it uses less digits than its factorization.

155431241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852.

The product of its digits is 2400, while the sum is 26.

The square root of 155431241 is about 12467.2066237790. The cubic root of 155431241 is about 537.6662443041. Note that the first 3 decimals are identical.

Adding to 155431241 its reverse (142134551), we get a palindrome (297565792).

The spelling of 155431241 in words is "one hundred fifty-five million, four hundred thirty-one thousand, two hundred forty-one".