45531513121 has 2 divisors, whose sum is σ = 45531513122. Its totient is φ = 45531513120.

The previous prime is 45531513119. The next prime is 45531513127. The reversal of 45531513121 is 12131513554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42898694400 + 2632818721 = 207120^2 + 51311^2 .

It is a cyclic number.

It is not a de Polignac number, because 45531513121 - 2¹ = 45531513119 is a prime.

Together with 45531513119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (45531513127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22765756560 + 22765756561.

It is an arithmetic number, because the mean of its divisors is an integer number (22765756561).

Almost surely, 2^45531513121 is an apocalyptic number.

It is an amenable number.

45531513121 is a deficient number, since it is larger than the sum of its proper divisors (1).

45531513121 is an equidigital number, since it uses as much as digits as its factorization.

45531513121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 31.

The spelling of 45531513121 in words is "forty-five billion, five hundred thirty-one million, five hundred thirteen thousand, one hundred twenty-one".