40220523 has 64 divisors (see below), whose sum is σ = 71808000. Its totient is φ = 22226400.

The previous prime is 40220513. The next prime is 40220527. The reversal of 40220523 is 32502204.

It is not a de Polignac number, because 40220523 - 2⁴ = 40220507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40220496 and 40220505.

It is not an unprimeable number, because it can be changed into a prime (40220527) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 398173 + ... + 398273.

It is an arithmetic number, because the mean of its divisors is an integer number (1122000).

Almost surely, 2^40220523 is an apocalyptic number.

40220523 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

40220523 is a deficient number, since it is larger than the sum of its proper divisors (31587477).

40220523 is a wasteful number, since it uses less digits than its factorization.

40220523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 40220523 is about 6341.9652316928. The cubic root of 40220523 is about 342.6225196137.

Adding to 40220523 its reverse (32502204), we get a palindrome (72722727).

The spelling of 40220523 in words is "forty million, two hundred twenty thousand, five hundred twenty-three".