247233730537121 has 4 divisors (see below), whose sum is σ = 247879249416192. Its totient is φ = 246588211658052.

The previous prime is 247233730537091. The next prime is 247233730537133. The reversal of 247233730537121 is 121735037332742.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247233730537121 is a prime.

It is a super-2 number, since 2×247233730537121² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 247233730537121.

It is not an unprimeable number, because it can be changed into a prime (247233730537181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322759438961 + ... + 322759439726.

It is an arithmetic number, because the mean of its divisors is an integer number (61969812354048).

Almost surely, 2^{247233730537121} is an apocalyptic number.

It is an amenable number.

247233730537121 is a deficient number, since it is larger than the sum of its proper divisors (645518879071).

247233730537121 is an equidigital number, since it uses as much as digits as its factorization.

247233730537121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645518879070.

The product of its (nonzero) digits is 4445280, while the sum is 50.

Adding to 247233730537121 its reverse (121735037332742), we get a palindrome (368968767869863).

The spelling of 247233730537121 in words is "two hundred forty-seven trillion, two hundred thirty-three billion, seven hundred thirty million, five hundred thirty-seven thousand, one hundred twenty-one".