31536061 has 2 divisors, whose sum is σ = 31536062. Its totient is φ = 31536060.

The previous prime is 31536053. The next prime is 31536097. The reversal of 31536061 is 16063513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18619225 + 12916836 = 4315^2 + 3594^2 .

It is a cyclic number.

It is not a de Polignac number, because 31536061 - 2³ = 31536053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31536161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15768030 + 15768031.

It is an arithmetic number, because the mean of its divisors is an integer number (15768031).

Almost surely, 2^31536061 is an apocalyptic number.

It is an amenable number.

31536061 is a deficient number, since it is larger than the sum of its proper divisors (1).

31536061 is an equidigital number, since it uses as much as digits as its factorization.

31536061 is an odious number, because the sum of its binary digits is odd.

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

The square root of 31536061 is about 5615.6977304695. The cubic root of 31536061 is about 315.9384493963.

Adding to 31536061 its reverse (16063513), we get a palindrome (47599574).

The spelling of 31536061 in words is "thirty-one million, five hundred thirty-six thousand, sixty-one".