531400242149 has 20 divisors (see below), whose sum is σ = 641307044460. Its totient is φ = 439779453120.

The previous prime is 531400242133. The next prime is 531400242151. The reversal of 531400242149 is 941242004135.

It can be written as a sum of positive squares in 2 ways, for example, as 131230134049 + 400170108100 = 362257^2 + 632590^2 .

It is not a de Polignac number, because 531400242149 - 2⁴ = 531400242133 is a prime.

It is a super-2 number, since 2×531400242149² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531400242049) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3746312 + ... + 3885569.

It is an arithmetic number, because the mean of its divisors is an integer number (32065352223).

Almost surely, 2^531400242149 is an apocalyptic number.

It is an amenable number.

531400242149 is a deficient number, since it is larger than the sum of its proper divisors (109906802311).

531400242149 is an frugal number, since it uses more digits than its factorization.

531400242149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7631938 (or 7631917 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 531400242149 in words is "five hundred thirty-one billion, four hundred million, two hundred forty-two thousand, one hundred forty-nine".