10216731 has 8 divisors (see below), whose sum is σ = 15568384. Its totient is φ = 5838120.

The previous prime is 10216727. The next prime is 10216747. The reversal of 10216731 is 13761201.

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

It is not a de Polignac number, because 10216731 - 2² = 10216727 is a prime.

It is a super-2 number, since 2×10216731² = 208763184652722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 486511 = 10216731 / (1 + 0 + 2 + 1 + 6 + 7 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10216698 and 10216707.

It is not an unprimeable number, because it can be changed into a prime (10216751) 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, 243235 + ... + 243276.

It is an arithmetic number, because the mean of its divisors is an integer number (1946048).

Almost surely, 2^10216731 is an apocalyptic number.

10216731 is a deficient number, since it is larger than the sum of its proper divisors (5351653).

10216731 is an equidigital number, since it uses as much as digits as its factorization.

10216731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486521.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 10216731 is about 3196.3621509460. The cubic root of 10216731 is about 216.9888007698.

Adding to 10216731 its reverse (13761201), we get a palindrome (23977932).

The spelling of 10216731 in words is "ten million, two hundred sixteen thousand, seven hundred thirty-one".