31416465 has 16 divisors (see below), whose sum is σ = 50387328. Its totient is φ = 16715136.

The previous prime is 31416461. The next prime is 31416479. The reversal of 31416465 is 56461413.

It is not a de Polignac number, because 31416465 - 2² = 31416461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31416461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4564 + ... + 9146.

It is an arithmetic number, because the mean of its divisors is an integer number (3149208).

Almost surely, 2^31416465 is an apocalyptic number.

It is an amenable number.

31416465 is a deficient number, since it is larger than the sum of its proper divisors (18970863).

31416465 is a wasteful number, since it uses less digits than its factorization.

31416465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5048.

The product of its digits is 8640, while the sum is 30.

The square root of 31416465 is about 5605.0392505316. The cubic root of 31416465 is about 315.5385596702.

Adding to 31416465 its reverse (56461413), we get a palindrome (87877878).

The spelling of 31416465 in words is "thirty-one million, four hundred sixteen thousand, four hundred sixty-five".