40540531 has 4 divisors (see below), whose sum is σ = 40588912. Its totient is φ = 40492152.

The previous prime is 40540519. The next prime is 40540543. The reversal of 40540531 is 13504504.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40540519) and next prime (40540543).

It is a cyclic number.

It is not a de Polignac number, because 40540531 - 2⁵ = 40540499 is a prime.

It is a super-2 number, since 2×40540531² = 3287069307523922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40040531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22911 + ... + 24616.

It is an arithmetic number, because the mean of its divisors is an integer number (10147228).

Almost surely, 2^40540531 is an apocalyptic number.

40540531 is a deficient number, since it is larger than the sum of its proper divisors (48381).

40540531 is an equidigital number, since it uses as much as digits as its factorization.

40540531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48380.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 40540531 is about 6367.1446504693. The cubic root of 40540531 is about 343.5287936160.

The spelling of 40540531 in words is "forty million, five hundred forty thousand, five hundred thirty-one".