155512240232 has 8 divisors (see below), whose sum is σ = 291585450450. Its totient is φ = 77756120112.

The previous prime is 155512240171. The next prime is 155512240237. The reversal of 155512240232 is 232042215551.

It can be written as a sum of positive squares in only one way, i.e., 152735582596 + 2776657636 = 390814^2 + 52694^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (155512240237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9719515007 + ... + 9719515022.

Almost surely, 2^155512240232 is an apocalyptic number.

It is an amenable number.

155512240232 is a deficient number, since it is larger than the sum of its proper divisors (136073210218).

155512240232 is a wasteful number, since it uses less digits than its factorization.

155512240232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19439030035 (or 19439030031 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 155512240232 its reverse (232042215551), we get a palindrome (387554455783).

The spelling of 155512240232 in words is "one hundred fifty-five billion, five hundred twelve million, two hundred forty thousand, two hundred thirty-two".