40369531 has 4 divisors (see below), whose sum is σ = 42124752. Its totient is φ = 38614312.

The previous prime is 40369523. The next prime is 40369541. The reversal of 40369531 is 13596304.

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

It is a cyclic number.

It is not a de Polignac number, because 40369531 - 2³ = 40369523 is a prime.

It is a super-2 number, since 2×40369531² = 3259398066319922, 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 = 40369493 and 40369502.

It is not an unprimeable number, because it can be changed into a prime (40369541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 877576 + ... + 877621.

It is an arithmetic number, because the mean of its divisors is an integer number (10531188).

Almost surely, 2^40369531 is an apocalyptic number.

40369531 is a deficient number, since it is larger than the sum of its proper divisors (1755221).

40369531 is a wasteful number, since it uses less digits than its factorization.

40369531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755220.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 40369531 is about 6353.7021491411. The cubic root of 40369531 is about 343.0451113223.

The spelling of 40369531 in words is "forty million, three hundred sixty-nine thousand, five hundred thirty-one".