45121231 has 2 divisors, whose sum is σ = 45121232. Its totient is φ = 45121230.

The previous prime is 45121211. The next prime is 45121243. The reversal of 45121231 is 13212154.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45121231 - 2⁷ = 45121103 is a prime.

It is a super-2 number, since 2×45121231² = 4071850973910722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45121199 and 45121208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45121201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22560615 + 22560616.

It is an arithmetic number, because the mean of its divisors is an integer number (22560616).

Almost surely, 2^45121231 is an apocalyptic number.

45121231 is a deficient number, since it is larger than the sum of its proper divisors (1).

45121231 is an equidigital number, since it uses as much as digits as its factorization.

45121231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 19.

The square root of 45121231 is about 6717.2338801027. The cubic root of 45121231 is about 356.0084556970.

Adding to 45121231 its reverse (13212154), we get a palindrome (58333385).

The spelling of 45121231 in words is "forty-five million, one hundred twenty-one thousand, two hundred thirty-one".