531266140 has 24 divisors (see below), whose sum is σ = 1116753120. Its totient is φ = 212298048.

The previous prime is 531266129. The next prime is 531266147. The reversal of 531266140 is 41662135.

It is a junction number, because it is equal to n+sod(n) for n = 531266099 and 531266108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531266147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8766 + ... + 33754.

It is an arithmetic number, because the mean of its divisors is an integer number (46531380).

Almost surely, 2^531266140 is an apocalyptic number.

It is an amenable number.

531266140 is an abundant number, since it is smaller than the sum of its proper divisors (585486980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531266140 is a wasteful number, since it uses less digits than its factorization.

531266140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26061 (or 26059 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 531266140 is about 23049.2112663319. The cubic root of 531266140 is about 809.9111521711.

The spelling of 531266140 in words is "five hundred thirty-one million, two hundred sixty-six thousand, one hundred forty".