31323061 has 16 divisors (see below), whose sum is σ = 41351040. Its totient is φ = 22970880.

The previous prime is 31323023. The next prime is 31323107. The reversal of 31323061 is 16032313.

It is a cyclic number.

It is not a de Polignac number, because 31323061 - 2⁷ = 31322933 is a prime.

It is a super-2 number, since 2×31323061² = 1962268300819442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31323961) 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, 10656 + ... + 13273.

It is an arithmetic number, because the mean of its divisors is an integer number (2584440).

Almost surely, 2^31323061 is an apocalyptic number.

It is an amenable number.

31323061 is a deficient number, since it is larger than the sum of its proper divisors (10027979).

31323061 is a wasteful number, since it uses less digits than its factorization.

31323061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23964.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 31323061 is about 5596.7009032107. The cubic root of 31323061 is about 315.2255410013.

Adding to 31323061 its reverse (16032313), we get a palindrome (47355374).

The spelling of 31323061 in words is "thirty-one million, three hundred twenty-three thousand, sixty-one".