400243100145425 has 12 divisors (see below), whose sum is σ = 497276496149340. Its totient is φ = 319565414329920.

The previous prime is 400243100145389. The next prime is 400243100145431. The reversal of 400243100145425 is 524541001342004.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 36946119902224 + 363296980243201 = 6078332^2 + 19060351^2 .

It is not a de Polignac number, because 400243100145425 - 2⁴² = 395845053634321 is a prime.

It is a super-2 number, since 2×400243100145425² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15726631682 + ... + 15726657131.

It is an arithmetic number, because the mean of its divisors is an integer number (41439708012445).

Almost surely, 2^{400243100145425} is an apocalyptic number.

It is an amenable number.

400243100145425 is a deficient number, since it is larger than the sum of its proper divisors (97033396003915).

400243100145425 is a wasteful number, since it uses less digits than its factorization.

400243100145425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31453289332 (or 31453289327 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 400243100145425 its reverse (524541001342004), we get a palindrome (924784101487429).

The spelling of 400243100145425 in words is "four hundred trillion, two hundred forty-three billion, one hundred million, one hundred forty-five thousand, four hundred twenty-five".