45155621 has 8 divisors (see below), whose sum is σ = 54642240. Its totient is φ = 36427968.

The previous prime is 45155599. The next prime is 45155659. The reversal of 45155621 is 12655154.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 45155621 - 2¹⁰ = 45154597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45155681) 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, 189611 + ... + 189848.

It is an arithmetic number, because the mean of its divisors is an integer number (6830280).

Almost surely, 2^45155621 is an apocalyptic number.

It is an amenable number.

45155621 is a deficient number, since it is larger than the sum of its proper divisors (9486619).

45155621 is a wasteful number, since it uses less digits than its factorization.

45155621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379483.

The product of its digits is 6000, while the sum is 29.

The square root of 45155621 is about 6719.7932259855. The cubic root of 45155621 is about 356.0988789219.

The spelling of 45155621 in words is "forty-five million, one hundred fifty-five thousand, six hundred twenty-one".