9551221914 has 96 divisors (see below), whose sum is σ = 21652700544. Its totient is φ = 2802159360.

The previous prime is 9551221909. The next prime is 9551221919. The reversal of 9551221914 is 4191221559.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9551221909) and next prime (9551221919).

It is a super-3 number, since 3×9551221914³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (9551221919) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12616824 + ... + 12617580.

It is an arithmetic number, because the mean of its divisors is an integer number (225548964).

Almost surely, 2^9551221914 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9551221914, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10826350272).

9551221914 is an abundant number, since it is smaller than the sum of its proper divisors (12101478630).

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

9551221914 is a wasteful number, since it uses less digits than its factorization.

9551221914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352 (or 1339 counting only the distinct ones).

The product of its digits is 32400, while the sum is 39.

The square root of 9551221914 is about 97730.3530843924. The cubic root of 9551221914 is about 2121.7114098310.

It can be divided in two parts, 955122 and 1914, that added together give a triangular number (957036 = T₁₃₈₃).

The spelling of 9551221914 in words is "nine billion, five hundred fifty-one million, two hundred twenty-one thousand, nine hundred fourteen".