401312555252 has 18 divisors (see below), whose sum is σ = 816957702162. Its totient is φ = 171991095024.

The previous prime is 401312555243. The next prime is 401312555261. The reversal of 401312555252 is 252555213104.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (401312555243) and next prime (401312555261).

It can be written as a sum of positive squares in only one way, i.e., 373374769936 + 27937785316 = 611044^2 + 167146^2 .

It is a super-2 number, since 2×401312555252² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1023756323 + ... + 1023756714.

It is an arithmetic number, because the mean of its divisors is an integer number (45386539009).

Almost surely, 2^401312555252 is an apocalyptic number.

It is an amenable number.

401312555252 is an abundant number, since it is smaller than the sum of its proper divisors (415645146910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401312555252 is a wasteful number, since it uses less digits than its factorization.

401312555252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047513055 (or 2047513046 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

Adding to 401312555252 its reverse (252555213104), we get a palindrome (653867768356).

The spelling of 401312555252 in words is "four hundred one billion, three hundred twelve million, five hundred fifty-five thousand, two hundred fifty-two".