531143545 has 16 divisors (see below), whose sum is σ = 653650560. Its totient is φ = 414198400.

The previous prime is 531143539. The next prime is 531143551. The reversal of 531143545 is 545341135.

It is an interprime number because it is at equal distance from previous prime (531143539) and next prime (531143551).

It is not a de Polignac number, because 531143545 - 2⁵ = 531143513 is a prime.

It is a super-2 number, since 2×531143545² = 564226930790334050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23190 + ... + 40000.

It is an arithmetic number, because the mean of its divisors is an integer number (40853160).

Almost surely, 2^531143545 is an apocalyptic number.

It is an amenable number.

531143545 is a deficient number, since it is larger than the sum of its proper divisors (122507015).

531143545 is a wasteful number, since it uses less digits than its factorization.

531143545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16976.

The product of its digits is 18000, while the sum is 31.

The square root of 531143545 is about 23046.5516943425. The cubic root of 531143545 is about 809.8488489997.

The spelling of 531143545 in words is "five hundred thirty-one million, one hundred forty-three thousand, five hundred forty-five".