400051669531 has 4 divisors (see below), whose sum is σ = 404546632200. Its totient is φ = 395556706864.

The previous prime is 400051669517. The next prime is 400051669541. The reversal of 400051669531 is 135966150004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400051669531 - 2¹⁷ = 400051538459 is a prime.

It is a super-2 number, since 2×400051669531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400051669541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2247481201 + ... + 2247481378.

It is an arithmetic number, because the mean of its divisors is an integer number (101136658050).

Almost surely, 2^400051669531 is an apocalyptic number.

400051669531 is a deficient number, since it is larger than the sum of its proper divisors (4494962669).

400051669531 is an equidigital number, since it uses as much as digits as its factorization.

400051669531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4494962668.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 400051669531 in words is "four hundred billion, fifty-one million, six hundred sixty-nine thousand, five hundred thirty-one".