40572229 has 2 divisors, whose sum is σ = 40572230. Its totient is φ = 40572228.

The previous prime is 40572197. The next prime is 40572269. The reversal of 40572229 is 92227504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29181604 + 11390625 = 5402^2 + 3375^2 .

It is a cyclic number.

It is not a de Polignac number, because 40572229 - 2⁵ = 40572197 is a prime.

It is a super-2 number, since 2×40572229² = 3292211532056882, which contains 22 as substring.

It is equal to p_2466346 and since 40572229 and 2466346 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40572229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40572269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20286114 + 20286115.

It is an arithmetic number, because the mean of its divisors is an integer number (20286115).

Almost surely, 2^40572229 is an apocalyptic number.

It is an amenable number.

40572229 is a deficient number, since it is larger than the sum of its proper divisors (1).

40572229 is an equidigital number, since it uses as much as digits as its factorization.

40572229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 40572229 is about 6369.6333489456. The cubic root of 40572229 is about 343.6183035348.

The spelling of 40572229 in words is "forty million, five hundred seventy-two thousand, two hundred twenty-nine".