631312506061 has 2 divisors, whose sum is σ = 631312506062. Its totient is φ = 631312506060.

The previous prime is 631312506049. The next prime is 631312506091. The reversal of 631312506061 is 160605213136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349022189961 + 282290316100 = 590781^2 + 531310^2 .

It is a cyclic number.

It is not a de Polignac number, because 631312506061 - 2⁵ = 631312506029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631312506091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315656253030 + 315656253031.

It is an arithmetic number, because the mean of its divisors is an integer number (315656253031).

Almost surely, 2^631312506061 is an apocalyptic number.

It is an amenable number.

631312506061 is a deficient number, since it is larger than the sum of its proper divisors (1).

631312506061 is an equidigital number, since it uses as much as digits as its factorization.

631312506061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

Adding to 631312506061 its reverse (160605213136), we get a palindrome (791917719197).

The spelling of 631312506061 in words is "six hundred thirty-one billion, three hundred twelve million, five hundred six thousand, sixty-one".