22047431 has 8 divisors (see below), whose sum is σ = 25390464. Its totient is φ = 18752760.

The previous prime is 22047427. The next prime is 22047437. The reversal of 22047431 is 13474022.

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 22047431 - 2² = 22047427 is a prime.

It is a super-2 number, since 2×22047431² = 972178427399522, 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 = 22047397 and 22047406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22047437) 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, 11105 + ... + 12938.

It is an arithmetic number, because the mean of its divisors is an integer number (3173808).

Almost surely, 2^22047431 is an apocalyptic number.

22047431 is a deficient number, since it is larger than the sum of its proper divisors (3343033).

22047431 is a wasteful number, since it uses less digits than its factorization.

22047431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24181.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 22047431 is about 4695.4691991323. The cubic root of 22047431 is about 280.4051575055.

The spelling of 22047431 in words is "twenty-two million, forty-seven thousand, four hundred thirty-one".