31061464949521 has 4 divisors (see below), whose sum is σ = 31587930457200. Its totient is φ = 30534999441844.

The previous prime is 31061464949519. The next prime is 31061464949539. The reversal of 31061464949521 is 12594946416013.

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 not a de Polignac number, because 31061464949521 - 2¹ = 31061464949519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31061464989521) 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, 263232753751 + ... + 263232753868.

It is an arithmetic number, because the mean of its divisors is an integer number (7896982614300).

Almost surely, 2^{31061464949521} is an apocalyptic number.

It is an amenable number.

31061464949521 is a deficient number, since it is larger than the sum of its proper divisors (526465507679).

31061464949521 is an equidigital number, since it uses as much as digits as its factorization.

31061464949521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526465507678.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 31061464949521 in words is "thirty-one trillion, sixty-one billion, four hundred sixty-four million, nine hundred forty-nine thousand, five hundred twenty-one".