31320153 has 6 divisors (see below), whose sum is σ = 45240234. Its totient is φ = 20880096.

The previous prime is 31320109. The next prime is 31320173. The reversal of 31320153 is 35102313.

It can be written as a sum of positive squares in only one way, i.e., 23299929 + 8020224 = 4827^2 + 2832^2 .

It is not a de Polignac number, because 31320153 - 2¹⁰ = 31319129 is a prime.

It is a super-3 number, since 3×31320153³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (31320173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1740000 + ... + 1740017.

It is an arithmetic number, because the mean of its divisors is an integer number (7540039).

Almost surely, 2^31320153 is an apocalyptic number.

It is an amenable number.

31320153 is a deficient number, since it is larger than the sum of its proper divisors (13920081).

31320153 is a wasteful number, since it uses less digits than its factorization.

31320153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480023 (or 3480020 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 31320153 is about 5596.4411012714. The cubic root of 31320153 is about 315.2157856303.

Adding to 31320153 its reverse (35102313), we get a palindrome (66422466).

The spelling of 31320153 in words is "thirty-one million, three hundred twenty thousand, one hundred fifty-three".