15323554212 has 12 divisors (see below), whose sum is σ = 35754959856. Its totient is φ = 5107851400.

The previous prime is 15323554187. The next prime is 15323554217. The reversal of 15323554212 is 21245532351.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×15323554212² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15323554217) 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, 638481414 + ... + 638481437.

It is an arithmetic number, because the mean of its divisors is an integer number (2979579988).

Almost surely, 2^15323554212 is an apocalyptic number.

15323554212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15323554212 is an abundant number, since it is smaller than the sum of its proper divisors (20431405644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15323554212 is a wasteful number, since it uses less digits than its factorization.

15323554212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276962858 (or 1276962856 counting only the distinct ones).

The product of its digits is 36000, while the sum is 33.

The spelling of 15323554212 in words is "fifteen billion, three hundred twenty-three million, five hundred fifty-four thousand, two hundred twelve".