65431930 has 8 divisors (see below), whose sum is σ = 117777492. Its totient is φ = 26172768.

The previous prime is 65431913. The next prime is 65431931. The reversal of 65431930 is 3913456.

It can be written as a sum of positive squares in 2 ways, for example, as 65431921 + 9 = 8089^2 + 3^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 65431892 and 65431901.

It is not an unprimeable number, because it can be changed into a prime (65431931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3271587 + ... + 3271606.

Almost surely, 2^65431930 is an apocalyptic number.

65431930 is a deficient number, since it is larger than the sum of its proper divisors (52345562).

65431930 is a wasteful number, since it uses less digits than its factorization.

65431930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543200.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 65431930 is about 8089.0005563110. Note that the first 3 decimals coincide. The cubic root of 65431930 is about 402.9612114703.

The spelling of 65431930 in words is "sixty-five million, four hundred thirty-one thousand, nine hundred thirty".