45312501221 has 6 divisors (see below), whose sum is σ = 49066199730. Its totient is φ = 41826924048.

The previous prime is 45312501161. The next prime is 45312501277. The reversal of 45312501221 is 12210521354.

It can be written as a sum of positive squares in 3 ways, for example, as 743380225 + 44569120996 = 27265^2 + 211114^2 .

It is a de Polignac number, because none of the positive numbers 2^k-45312501221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45312501121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 134060486 + ... + 134060823.

It is an arithmetic number, because the mean of its divisors is an integer number (8177699955).

Almost surely, 2^45312501221 is an apocalyptic number.

It is an amenable number.

45312501221 is a deficient number, since it is larger than the sum of its proper divisors (3753698509).

45312501221 is a wasteful number, since it uses less digits than its factorization.

45312501221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268121335 (or 268121322 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 45312501221 in words is "forty-five billion, three hundred twelve million, five hundred one thousand, two hundred twenty-one".