401223152561 has 32 divisors (see below), whose sum is σ = 506681360640. Its totient is φ = 308625408000.

The previous prime is 401223152543. The next prime is 401223152579. The reversal of 401223152561 is 165251322104.

It is an interprime number because it is at equal distance from previous prime (401223152543) and next prime (401223152579).

It is not a de Polignac number, because 401223152561 - 2⁶ = 401223152497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (401223152581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2544305 + ... + 2697393.

It is an arithmetic number, because the mean of its divisors is an integer number (15833792520).

Almost surely, 2^401223152561 is an apocalyptic number.

It is an amenable number.

401223152561 is a deficient number, since it is larger than the sum of its proper divisors (105458208079).

401223152561 is a wasteful number, since it uses less digits than its factorization.

401223152561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153545.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 401223152561 its reverse (165251322104), we get a palindrome (566474474665).

The spelling of 401223152561 in words is "four hundred one billion, two hundred twenty-three million, one hundred fifty-two thousand, five hundred sixty-one".