40537157 has 4 divisors (see below), whose sum is σ = 41935020. Its totient is φ = 39139296.
The previous prime is 40537139. The next prime is 40537169. The reversal of 40537157 is 75173504.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 31013761 + 9523396 = 5569^2 + 3086^2 .
It is a cyclic number.
It is not a de Polignac number, because 40537157 - 28 = 40536901 is a prime.
It is a super-2 number, since 2×405371572 = 3286522195285298, 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 (40537177) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698888 + ... + 698945.
It is an arithmetic number, because the mean of its divisors is an integer number (10483755).
Almost surely, 240537157 is an apocalyptic number.
It is an amenable number.
40537157 is a deficient number, since it is larger than the sum of its proper divisors (1397863).
40537157 is a wasteful number, since it uses less digits than its factorization.
40537157 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1397862.
The product of its (nonzero) digits is 14700, while the sum is 32.
The square root of 40537157 is about 6366.8796910261. The cubic root of 40537157 is about 343.5192632499.
The spelling of 40537157 in words is "forty million, five hundred thirty-seven thousand, one hundred fifty-seven".
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