15554532212 has 12 divisors (see below), whose sum is σ = 27372502080. Its totient is φ = 7733817336.

The previous prime is 15554532179. The next prime is 15554532223. The reversal of 15554532212 is 21223545551.

It is a happy number.

It is a super-2 number, since 2×15554532212² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10861388 + ... + 10862819.

It is an arithmetic number, because the mean of its divisors is an integer number (2281041840).

Almost surely, 2^15554532212 is an apocalyptic number.

It is an amenable number.

15554532212 is a deficient number, since it is larger than the sum of its proper divisors (11817969868).

15554532212 is a wasteful number, since it uses less digits than its factorization.

15554532212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21724390 (or 21724388 counting only the distinct ones).

The product of its digits is 60000, while the sum is 35.

The spelling of 15554532212 in words is "fifteen billion, five hundred fifty-four million, five hundred thirty-two thousand, two hundred twelve".