45531212521 has 8 divisors (see below), whose sum is σ = 47456274944. Its totient is φ = 43634669760.

The previous prime is 45531212477. The next prime is 45531212549. The reversal of 45531212521 is 12521213554.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45531212521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45531212821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7126656 + ... + 7133041.

It is an arithmetic number, because the mean of its divisors is an integer number (5932034368).

Almost surely, 2^45531212521 is an apocalyptic number.

It is an amenable number.

45531212521 is a deficient number, since it is larger than the sum of its proper divisors (1925062423).

45531212521 is a wasteful number, since it uses less digits than its factorization.

45531212521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14259831.

The product of its digits is 12000, while the sum is 31.

The spelling of 45531212521 in words is "forty-five billion, five hundred thirty-one million, two hundred twelve thousand, five hundred twenty-one".