31420153 has 2 divisors, whose sum is σ = 31420154. Its totient is φ = 31420152.

The previous prime is 31420133. The next prime is 31420157. The reversal of 31420153 is 35102413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19607184 + 11812969 = 4428^2 + 3437^2 .

It is an emirp because it is prime and its reverse (35102413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31420153 - 2²¹ = 29323001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31420153.

It is not a weakly prime, because it can be changed into another prime (31420157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710076 + 15710077.

It is an arithmetic number, because the mean of its divisors is an integer number (15710077).

Almost surely, 2^31420153 is an apocalyptic number.

It is an amenable number.

31420153 is a deficient number, since it is larger than the sum of its proper divisors (1).

31420153 is an equidigital number, since it uses as much as digits as its factorization.

31420153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 31420153 is about 5605.3682305447. The cubic root of 31420153 is about 315.5509062818.

Adding to 31420153 its reverse (35102413), we get a palindrome (66522566).

The spelling of 31420153 in words is "thirty-one million, four hundred twenty thousand, one hundred fifty-three".