40142223 has 20 divisors (see below), whose sum is σ = 65418408. Its totient is φ = 24328080.

The previous prime is 40142213. The next prime is 40142251. The reversal of 40142223 is 32224104.

40142223 is a `hidden beast` number, since 401 + 42 + 223 = 666.

It is not a de Polignac number, because 40142223 - 2⁶ = 40142159 is a prime.

It is a super-2 number, since 2×40142223² = 3222796134763458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40142196 and 40142205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40142213) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21636 + ... + 23417.

Almost surely, 2^40142223 is an apocalyptic number.

40142223 is a deficient number, since it is larger than the sum of its proper divisors (25276185).

40142223 is a wasteful number, since it uses less digits than its factorization.

40142223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45076 (or 45067 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40142223 is about 6335.7890589886. The cubic root of 40142223 is about 342.4000397369.

Adding to 40142223 its reverse (32224104), we get a palindrome (72366327).

It can be divided in two parts, 401 and 42223, that added together give a palindrome (42624).

The spelling of 40142223 in words is "forty million, one hundred forty-two thousand, two hundred twenty-three".