31423011 has 16 divisors (see below), whose sum is σ = 43110144. Its totient is φ = 20350304.

The previous prime is 31422997. The next prime is 31423033. The reversal of 31423011 is 11032413.

It is not a de Polignac number, because 31423011 - 2⁷ = 31422883 is a prime.

It is a super-2 number, since 2×31423011² = 1974811240612242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31423081) 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, 16090 + ... + 17936.

It is an arithmetic number, because the mean of its divisors is an integer number (2694384).

Almost surely, 2^31423011 is an apocalyptic number.

31423011 is a deficient number, since it is larger than the sum of its proper divisors (11687133).

31423011 is a wasteful number, since it uses less digits than its factorization.

31423011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31423011 is about 5605.6231589360. The cubic root of 31423011 is about 315.5604735718.

Adding to 31423011 its reverse (11032413), we get a palindrome (42455424).

The spelling of 31423011 in words is "thirty-one million, four hundred twenty-three thousand, eleven".