155631244 has 12 divisors (see below), whose sum is σ = 278997768. Its totient is φ = 75917600.

The previous prime is 155631199. The next prime is 155631247. The reversal of 155631244 is 442136551.

It is a happy number.

155631244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (155631247) 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, 474322 + ... + 474649.

It is an arithmetic number, because the mean of its divisors is an integer number (23249814).

Almost surely, 2^155631244 is an apocalyptic number.

It is an amenable number.

155631244 is a deficient number, since it is larger than the sum of its proper divisors (123366524).

155631244 is a wasteful number, since it uses less digits than its factorization.

155631244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949016 (or 949014 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 155631244 is about 12475.2252083880. The cubic root of 155631244 is about 537.8967616060.

Adding to 155631244 its reverse (442136551), we get a palindrome (597767795).

It can be divided in two parts, 15563 and 1244, that added together give a 5-th power (16807 = 7⁵).

The spelling of 155631244 in words is "one hundred fifty-five million, six hundred thirty-one thousand, two hundred forty-four".