15531452312 has 8 divisors (see below), whose sum is σ = 29121473100. Its totient is φ = 7765726152.

The previous prime is 15531452267. The next prime is 15531452317. The reversal of 15531452312 is 21325413551.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15531452317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970715762 + ... + 970715777.

Almost surely, 2^15531452312 is an apocalyptic number.

It is an amenable number.

15531452312 is a deficient number, since it is larger than the sum of its proper divisors (13590020788).

15531452312 is a wasteful number, since it uses less digits than its factorization.

15531452312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941431545 (or 1941431541 counting only the distinct ones).

The product of its digits is 18000, while the sum is 32.

Adding to 15531452312 its reverse (21325413551), we get a palindrome (36856865863).

The spelling of 15531452312 in words is "fifteen billion, five hundred thirty-one million, four hundred fifty-two thousand, three hundred twelve".