400430400133421 has 16 divisors (see below), whose sum is σ = 484926309967104. Its totient is φ = 322788371721984.

The previous prime is 400430400133411. The next prime is 400430400133427. The reversal of 400430400133421 is 124331004034004.

It is a happy number.

It is not a de Polignac number, because 400430400133421 - 2¹⁰ = 400430400132397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400430400133427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1291081070 + ... + 1291391183.

It is an arithmetic number, because the mean of its divisors is an integer number (30307894372944).

Almost surely, 2^{400430400133421} is an apocalyptic number.

It is an amenable number.

400430400133421 is a deficient number, since it is larger than the sum of its proper divisors (84495909833683).

400430400133421 is a wasteful number, since it uses less digits than its factorization.

400430400133421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582473580.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 400430400133421 its reverse (124331004034004), we get a palindrome (524761404167425).

The spelling of 400430400133421 in words is "four hundred trillion, four hundred thirty billion, four hundred million, one hundred thirty-three thousand, four hundred twenty-one".