40920231 has 8 divisors (see below), whose sum is σ = 59520384. Its totient is φ = 24800120.

The previous prime is 40920227. The next prime is 40920259. The reversal of 40920231 is 13202904.

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 40920231 - 2² = 40920227 is a prime.

It is a super-2 number, since 2×40920231² = 3348930610186722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40920198 and 40920207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40920931) 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, 619971 + ... + 620036.

It is an arithmetic number, because the mean of its divisors is an integer number (7440048).

Almost surely, 2^40920231 is an apocalyptic number.

40920231 is a deficient number, since it is larger than the sum of its proper divisors (18600153).

40920231 is a wasteful number, since it uses less digits than its factorization.

40920231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240021.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 40920231 is about 6396.8922923557. The cubic root of 40920231 is about 344.5979521530.

The spelling of 40920231 in words is "forty million, nine hundred twenty thousand, two hundred thirty-one".