71221030 has 8 divisors (see below), whose sum is σ = 128197872. Its totient is φ = 28488408.

The previous prime is 71221021. The next prime is 71221049. The reversal of 71221030 is 3012217.

It is a happy number.

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

It is a super-2 number, since 2×71221030² = 10144870228521800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71220995 and 71221013.

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, 3561042 + ... + 3561061.

It is an arithmetic number, because the mean of its divisors is an integer number (16024734).

Almost surely, 2^71221030 is an apocalyptic number.

71221030 is a deficient number, since it is larger than the sum of its proper divisors (56976842).

71221030 is a wasteful number, since it uses less digits than its factorization.

71221030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7122110.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 71221030 is about 8439.2552988993. The cubic root of 71221030 is about 414.5110222836.

Adding to 71221030 its reverse (3012217), we get a palindrome (74233247).

The spelling of 71221030 in words is "seventy-one million, two hundred twenty-one thousand, thirty".