31312029 has 24 divisors (see below), whose sum is σ = 49494240. Its totient is φ = 17550624.

The previous prime is 31312007. The next prime is 31312033. The reversal of 31312029 is 92021313.

It is a happy number.

It is not a de Polignac number, because 31312029 - 2⁵ = 31311997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 31311996 and 31312014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5782 + ... + 9800.

It is an arithmetic number, because the mean of its divisors is an integer number (2062260).

Almost surely, 2^31312029 is an apocalyptic number.

It is an amenable number.

31312029 is a deficient number, since it is larger than the sum of its proper divisors (18182211).

31312029 is a wasteful number, since it uses less digits than its factorization.

31312029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089 (or 4082 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 31312029 is about 5595.7152357853. The cubic root of 31312029 is about 315.1885291172.

The spelling of 31312029 in words is "thirty-one million, three hundred twelve thousand, twenty-nine".