31451461 has 2 divisors, whose sum is σ = 31451462. Its totient is φ = 31451460.

The previous prime is 31451437. The next prime is 31451489. The reversal of 31451461 is 16415413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29095236 + 2356225 = 5394^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 31451461 - 2⁹ = 31450949 is a prime.

It is a super-3 number, since 3×31451461³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31451491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15725730 + 15725731.

It is an arithmetic number, because the mean of its divisors is an integer number (15725731).

Almost surely, 2^31451461 is an apocalyptic number.

It is an amenable number.

31451461 is a deficient number, since it is larger than the sum of its proper divisors (1).

31451461 is an equidigital number, since it uses as much as digits as its factorization.

31451461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 31451461 is about 5608.1602152578. The cubic root of 31451461 is about 315.6556796763.

Adding to 31451461 its reverse (16415413), we get a palindrome (47866874).

The spelling of 31451461 in words is "thirty-one million, four hundred fifty-one thousand, four hundred sixty-one".