31328153 has 2 divisors, whose sum is σ = 31328154. Its totient is φ = 31328152.

The previous prime is 31328137. The next prime is 31328183. The reversal of 31328153 is 35182313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17280649 + 14047504 = 4157^2 + 3748^2 .

It is a cyclic number.

It is not a de Polignac number, because 31328153 - 2⁴ = 31328137 is a prime.

It is not a weakly prime, because it can be changed into another prime (31328113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15664076 + 15664077.

It is an arithmetic number, because the mean of its divisors is an integer number (15664077).

Almost surely, 2^31328153 is an apocalyptic number.

It is an amenable number.

31328153 is a deficient number, since it is larger than the sum of its proper divisors (1).

31328153 is an equidigital number, since it uses as much as digits as its factorization.

31328153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 31328153 is about 5597.1557955805. The cubic root of 31328153 is about 315.2426215104.

The spelling of 31328153 in words is "thirty-one million, three hundred twenty-eight thousand, one hundred fifty-three".