155450431215 has 24 divisors (see below), whose sum is σ = 270261480528. Its totient is φ = 82656414720.

The previous prime is 155450431207. The next prime is 155450431219. The reversal of 155450431215 is 512134054551.

155450431215 is a `hidden beast` number, since 1 + 5 + 5 + 4 + 5 + 0 + 431 + 215 = 666.

155450431215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155450431215 - 2³ = 155450431207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155450431215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155450431219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5203314 + ... + 5233103.

It is an arithmetic number, because the mean of its divisors is an integer number (11260895022).

Almost surely, 2^155450431215 is an apocalyptic number.

155450431215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155450431215 is a deficient number, since it is larger than the sum of its proper divisors (114811049313).

155450431215 is a wasteful number, since it uses less digits than its factorization.

155450431215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10436759 (or 10436756 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

Adding to 155450431215 its reverse (512134054551), we get a palindrome (667584485766).

The spelling of 155450431215 in words is "one hundred fifty-five billion, four hundred fifty million, four hundred thirty-one thousand, two hundred fifteen".