40212523 has 4 divisors (see below), whose sum is σ = 43305808. Its totient is φ = 37119240.

The previous prime is 40212521. The next prime is 40212547. The reversal of 40212523 is 32521204.

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 40212523 - 2¹ = 40212521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40212523.

It is not an unprimeable number, because it can be changed into a prime (40212521) 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, 1546623 + ... + 1546648.

It is an arithmetic number, because the mean of its divisors is an integer number (10826452).

Almost surely, 2^40212523 is an apocalyptic number.

40212523 is a deficient number, since it is larger than the sum of its proper divisors (3093285).

40212523 is a wasteful number, since it uses less digits than its factorization.

40212523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093284.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40212523 is about 6341.3344810063. The cubic root of 40212523 is about 342.5998018426.

Adding to 40212523 its reverse (32521204), we get a palindrome (72733727).

The spelling of 40212523 in words is "forty million, two hundred twelve thousand, five hundred twenty-three".