400440124100531 has 4 divisors (see below), whose sum is σ = 400443428973864. Its totient is φ = 400436819227200.

The previous prime is 400440124100521. The next prime is 400440124100563. The reversal of 400440124100531 is 135001421044004.

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 400440124100531 - 2³⁴ = 400422944231347 is a prime.

It is a super-2 number, since 2×400440124100531² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400440124100494 and 400440124100503.

It is not an unprimeable number, because it can be changed into a prime (400440124100521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1652254910 + ... + 1652497251.

It is an arithmetic number, because the mean of its divisors is an integer number (100110857243466).

Almost surely, 2^{400440124100531} is an apocalyptic number.

400440124100531 is a deficient number, since it is larger than the sum of its proper divisors (3304873333).

400440124100531 is a wasteful number, since it uses less digits than its factorization.

400440124100531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304873332.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 400440124100531 its reverse (135001421044004), we get a palindrome (535441545144535).

The spelling of 400440124100531 in words is "four hundred trillion, four hundred forty billion, one hundred twenty-four million, one hundred thousand, five hundred thirty-one".