30722131 has 8 divisors (see below), whose sum is σ = 33861744. Its totient is φ = 27640320.

The previous prime is 30722129. The next prime is 30722137. The reversal of 30722131 is 13122703.

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

It is a cyclic number.

It is not a de Polignac number, because 30722131 - 2¹ = 30722129 is a prime.

It is a super-2 number, since 2×30722131² = 1887698666362322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30722099 and 30722108.

It is not an unprimeable number, because it can be changed into a prime (30722137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13330 + ... + 15463.

It is an arithmetic number, because the mean of its divisors is an integer number (4232718).

Almost surely, 2^30722131 is an apocalyptic number.

30722131 is a deficient number, since it is larger than the sum of its proper divisors (3139613).

30722131 is a wasteful number, since it uses less digits than its factorization.

30722131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28901.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 30722131 is about 5542.7548204841. The cubic root of 30722131 is about 313.1966529515.

Adding to 30722131 its reverse (13122703), we get a palindrome (43844834).

The spelling of 30722131 in words is "thirty million, seven hundred twenty-two thousand, one hundred thirty-one".