402544155 has 16 divisors (see below), whose sum is σ = 693614880. Its totient is φ = 198175488.

The previous prime is 402544097. The next prime is 402544159. The reversal of 402544155 is 551445204.

It is not a de Polignac number, because 402544155 - 2⁹ = 402543643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402544159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1031970 + ... + 1032359.

It is an arithmetic number, because the mean of its divisors is an integer number (43350930).

Almost surely, 2^402544155 is an apocalyptic number.

402544155 is a deficient number, since it is larger than the sum of its proper divisors (291070725).

402544155 is a wasteful number, since it uses less digits than its factorization.

402544155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064350.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 402544155 is about 20063.5030590373. The cubic root of 402544155 is about 738.3651240019.

Adding to 402544155 its reverse (551445204), we get a palindrome (953989359).

The spelling of 402544155 in words is "four hundred two million, five hundred forty-four thousand, one hundred fifty-five".