40140537 has 4 divisors (see below), whose sum is σ = 53520720. Its totient is φ = 26760356.

The previous prime is 40140511. The next prime is 40140539. The reversal of 40140537 is 73504104.

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 a cyclic number.

It is not a de Polignac number, because 40140537 - 2¹² = 40136441 is a prime.

It is a super-2 number, since 2×40140537² = 3222525421296738, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40140539) 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, 6690087 + ... + 6690092.

It is an arithmetic number, because the mean of its divisors is an integer number (13380180).

Almost surely, 2^40140537 is an apocalyptic number.

It is an amenable number.

40140537 is a deficient number, since it is larger than the sum of its proper divisors (13380183).

40140537 is a wasteful number, since it uses less digits than its factorization.

40140537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13380182.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 40140537 is about 6335.6560039194. The cubic root of 40140537 is about 342.3952459935.

The spelling of 40140537 in words is "forty million, one hundred forty thousand, five hundred thirty-seven".