400224529 has 2 divisors, whose sum is σ = 400224530. Its totient is φ = 400224528.

The previous prime is 400224511. The next prime is 400224533. The reversal of 400224529 is 925422004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372683025 + 27541504 = 19305^2 + 5248^2 .

It is a cyclic number.

It is not a de Polignac number, because 400224529 - 2⁵ = 400224497 is a prime.

It is a super-2 number, since 2×400224529² = 320359347226543682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400224497 and 400224506.

It is not a weakly prime, because it can be changed into another prime (400224509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200112264 + 200112265.

It is an arithmetic number, because the mean of its divisors is an integer number (200112265).

Almost surely, 2^400224529 is an apocalyptic number.

It is an amenable number.

400224529 is a deficient number, since it is larger than the sum of its proper divisors (1).

400224529 is an equidigital number, since it uses as much as digits as its factorization.

400224529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 400224529 is about 20005.6124375136. The cubic root of 400224529 is about 736.9441359258.

It can be divided in two parts, 40022 and 4529, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 400224529 in words is "four hundred million, two hundred twenty-four thousand, five hundred twenty-nine".