53431009 has 2 divisors, whose sum is σ = 53431010. Its totient is φ = 53431008.

The previous prime is 53430991. The next prime is 53431031. The reversal of 53431009 is 90013435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35664784 + 17766225 = 5972^2 + 4215^2 .

It is a cyclic number.

It is not a de Polignac number, because 53431009 - 2⁵ = 53430977 is a prime.

It is not a weakly prime, because it can be changed into another prime (53411009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26715504 + 26715505.

It is an arithmetic number, because the mean of its divisors is an integer number (26715505).

Almost surely, 2^53431009 is an apocalyptic number.

It is an amenable number.

53431009 is a deficient number, since it is larger than the sum of its proper divisors (1).

53431009 is an equidigital number, since it uses as much as digits as its factorization.

53431009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 53431009 is about 7309.6517700914. The cubic root of 53431009 is about 376.6440622176.

The spelling of 53431009 in words is "fifty-three million, four hundred thirty-one thousand, nine".