1631506241 has 2 divisors, whose sum is σ = 1631506242. Its totient is φ = 1631506240.

The previous prime is 1631506237. The next prime is 1631506249. The reversal of 1631506241 is 1426051361.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1339267216 + 292239025 = 36596^2 + 17095^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631506241 - 2² = 1631506237 is a prime.

It is a super-2 number, since 2×1631506241² = 5323625228843900162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1631506249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815753120 + 815753121.

It is an arithmetic number, because the mean of its divisors is an integer number (815753121).

Almost surely, 2^1631506241 is an apocalyptic number.

It is an amenable number.

1631506241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631506241 is an equidigital number, since it uses as much as digits as its factorization.

1631506241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1631506241 is about 40391.9081128882. The cubic root of 1631506241 is about 1177.2343159690.

The spelling of 1631506241 in words is "one billion, six hundred thirty-one million, five hundred six thousand, two hundred forty-one".