30220631 has 8 divisors (see below), whose sum is σ = 34644864. Its totient is φ = 25823160.

The previous prime is 30220591. The next prime is 30220633. The reversal of 30220631 is 13602203.

30220631 = T₂₅₁ + T₂₅₂ + ... + T₅₈₁.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30220631 is a prime.

It is a super-2 number, since 2×30220631² = 1826573076076322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30220633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4205 + ... + 8838.

It is an arithmetic number, because the mean of its divisors is an integer number (4330608).

Almost surely, 2^30220631 is an apocalyptic number.

30220631 is a deficient number, since it is larger than the sum of its proper divisors (4424233).

30220631 is a wasteful number, since it uses less digits than its factorization.

30220631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13381.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 30220631 is about 5497.3294425566. The cubic root of 30220631 is about 311.4831150934.

Adding to 30220631 its reverse (13602203), we get a palindrome (43822834).

The spelling of 30220631 in words is "thirty million, two hundred twenty thousand, six hundred thirty-one".