631231453 has 2 divisors, whose sum is σ = 631231454. Its totient is φ = 631231452.

The previous prime is 631231439. The next prime is 631231459. The reversal of 631231453 is 354132136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408565369 + 222666084 = 20213^2 + 14922^2 .

It is a cyclic number.

It is not a de Polignac number, because 631231453 - 2¹³ = 631223261 is a prime.

It is a super-5 number, since 5×631231453⁵ (a number of 45 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631231459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315615726 + 315615727.

It is an arithmetic number, because the mean of its divisors is an integer number (315615727).

Almost surely, 2^631231453 is an apocalyptic number.

It is an amenable number.

631231453 is a deficient number, since it is larger than the sum of its proper divisors (1).

631231453 is an equidigital number, since it uses as much as digits as its factorization.

631231453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

The square root of 631231453 is about 25124.3199509957. The cubic root of 631231453 is about 857.8200843319.

Adding to 631231453 its reverse (354132136), we get a palindrome (985363589).

The spelling of 631231453 in words is "six hundred thirty-one million, two hundred thirty-one thousand, four hundred fifty-three".