40731357 has 4 divisors (see below), whose sum is σ = 54308480. Its totient is φ = 27154236.

The previous prime is 40731331. The next prime is 40731389. The reversal of 40731357 is 75313704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40731357 - 2¹¹ = 40729309 is a prime.

It is a super-2 number, since 2×40731357² = 3318086886122898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40731557) 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, 6788557 + ... + 6788562.

It is an arithmetic number, because the mean of its divisors is an integer number (13577120).

Almost surely, 2^40731357 is an apocalyptic number.

It is an amenable number.

40731357 is a deficient number, since it is larger than the sum of its proper divisors (13577123).

40731357 is a wasteful number, since it uses less digits than its factorization.

40731357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13577122.

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 40731357 is about 6382.1122678938. The cubic root of 40731357 is about 344.0669516567.

The spelling of 40731357 in words is "forty million, seven hundred thirty-one thousand, three hundred fifty-seven".