31452161 has 16 divisors (see below), whose sum is σ = 34836480. Its totient is φ = 28217280.

The previous prime is 31452137. The next prime is 31452173. The reversal of 31452161 is 16125413.

It is not a de Polignac number, because 31452161 - 2⁶ = 31452097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31452121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131480 + ... + 131718.

It is an arithmetic number, because the mean of its divisors is an integer number (2177280).

Almost surely, 2^31452161 is an apocalyptic number.

It is an amenable number.

31452161 is a deficient number, since it is larger than the sum of its proper divisors (3384319).

31452161 is a wasteful number, since it uses less digits than its factorization.

31452161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496.

The product of its digits is 720, while the sum is 23.

The square root of 31452161 is about 5608.2226239692. Note that the first 3 decimals coincide. The cubic root of 31452161 is about 315.6580214577.

Adding to 31452161 its reverse (16125413), we get a palindrome (47577574).

It can be divided in two parts, 31452 and 161, that added together give a palindrome (31613).

The spelling of 31452161 in words is "thirty-one million, four hundred fifty-two thousand, one hundred sixty-one".