531172403 has 2 divisors, whose sum is σ = 531172404. Its totient is φ = 531172402.

The previous prime is 531172399. The next prime is 531172423. The reversal of 531172403 is 304271135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531172403 - 2² = 531172399 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (531172423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265586201 + 265586202.

It is an arithmetic number, because the mean of its divisors is an integer number (265586202).

Almost surely, 2^531172403 is an apocalyptic number.

531172403 is a deficient number, since it is larger than the sum of its proper divisors (1).

531172403 is an equidigital number, since it uses as much as digits as its factorization.

531172403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 531172403 is about 23047.1777664859. The cubic root of 531172403 is about 809.8635155904.

The spelling of 531172403 in words is "five hundred thirty-one million, one hundred seventy-two thousand, four hundred three".