40531797 has 6 divisors (see below), whose sum is σ = 58545942. Its totient is φ = 27021192.

The previous prime is 40531789. The next prime is 40531801. The reversal of 40531797 is 79713504.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 35892081 + 4639716 = 5991^2 + 2154^2 .

It is not a de Polignac number, because 40531797 - 2³ = 40531789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40531597) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2251758 + ... + 2251775.

It is an arithmetic number, because the mean of its divisors is an integer number (9757657).

Almost surely, 2^40531797 is an apocalyptic number.

It is an amenable number.

40531797 is a deficient number, since it is larger than the sum of its proper divisors (18014145).

40531797 is a wasteful number, since it uses less digits than its factorization.

40531797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503539 (or 4503536 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 40531797 is about 6366.4587487865. The cubic root of 40531797 is about 343.5041220433.

It can be divided in two parts, 40531 and 797, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 40531797 in words is "forty million, five hundred thirty-one thousand, seven hundred ninety-seven".