400252159 has 2 divisors, whose sum is σ = 400252160. Its totient is φ = 400252158.

The previous prime is 400252147. The next prime is 400252163. The reversal of 400252159 is 951252004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400252159 - 2¹¹ = 400250111 is a prime.

It is a super-3 number, since 3×400252159³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400252109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200126079 + 200126080.

It is an arithmetic number, because the mean of its divisors is an integer number (200126080).

Almost surely, 2^400252159 is an apocalyptic number.

400252159 is a deficient number, since it is larger than the sum of its proper divisors (1).

400252159 is an equidigital number, since it uses as much as digits as its factorization.

400252159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 400252159 is about 20006.3029818105. The cubic root of 400252159 is about 736.9610941551.

The spelling of 400252159 in words is "four hundred million, two hundred fifty-two thousand, one hundred fifty-nine".