11421831 has 8 divisors (see below), whose sum is σ = 16030720. Its totient is φ = 7213752.

The previous prime is 11421803. The next prime is 11421859. The reversal of 11421831 is 13812411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11421803) and next prime (11421859).

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

It is not a de Polignac number, because 11421831 - 2¹¹ = 11419783 is a prime.

It is a super-2 number, since 2×11421831² = 260916446785122, 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 = 11421798 and 11421807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11423831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100135 + ... + 100248.

It is an arithmetic number, because the mean of its divisors is an integer number (2003840).

Almost surely, 2^11421831 is an apocalyptic number.

11421831 is a deficient number, since it is larger than the sum of its proper divisors (4608889).

11421831 is a wasteful number, since it uses less digits than its factorization.

11421831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200405.

The product of its digits is 192, while the sum is 21.

The square root of 11421831 is about 3379.6199490475. The cubic root of 11421831 is about 225.2052842519.

Subtracting from 11421831 its sum of digits (21), we obtain a triangular number (11421810 = T₄₇₇₉).

It can be divided in two parts, 114 and 21831, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 11421831 in words is "eleven million, four hundred twenty-one thousand, eight hundred thirty-one".