33231241461661 has 2 divisors, whose sum is σ = 33231241461662. Its totient is φ = 33231241461660.

The previous prime is 33231241461643. The next prime is 33231241461667. The reversal of 33231241461661 is 16616414213233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32933882828025 + 297358633636 = 5738805^2 + 545306^2 .

It is a cyclic number.

It is not a de Polignac number, because 33231241461661 - 2²¹ = 33231239364509 is a prime.

It is a super-2 number, since 2×33231241461661² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33231241461667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16615620730830 + 16615620730831.

It is an arithmetic number, because the mean of its divisors is an integer number (16615620730831).

Almost surely, 2^{33231241461661} is an apocalyptic number.

It is an amenable number.

33231241461661 is a deficient number, since it is larger than the sum of its proper divisors (1).

33231241461661 is an equidigital number, since it uses as much as digits as its factorization.

33231241461661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 43.

Adding to 33231241461661 its reverse (16616414213233), we get a palindrome (49847655674894).

The spelling of 33231241461661 in words is "thirty-three trillion, two hundred thirty-one billion, two hundred forty-one million, four hundred sixty-one thousand, six hundred sixty-one".