30721055226 has 8 divisors (see below), whose sum is σ = 61442110464. Its totient is φ = 10240351740.

The previous prime is 30721055221. The next prime is 30721055297. The reversal of 30721055226 is 62255012703.

It is a sphenic number, since it is the product of 3 distinct primes.

30721055226 is an admirable number.

It is a super-2 number, since 2×30721055226² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30721055221) 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, 2560087930 + ... + 2560087941.

It is an arithmetic number, because the mean of its divisors is an integer number (7680263808).

Almost surely, 2^30721055226 is an apocalyptic number.

30721055226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

30721055226 is a wasteful number, since it uses less digits than its factorization.

30721055226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120175876.

The product of its (nonzero) digits is 25200, while the sum is 33.

Adding to 30721055226 its reverse (62255012703), we get a palindrome (92976067929).

The spelling of 30721055226 in words is "thirty billion, seven hundred twenty-one million, fifty-five thousand, two hundred twenty-six".