455150621 has 4 divisors (see below), whose sum is σ = 470845500. Its totient is φ = 439455744.

The previous prime is 455150609. The next prime is 455150623. The reversal of 455150621 is 126051554.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 286929721 + 168220900 = 16939^2 + 12970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-455150621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 15694849 = 455150621 / (4 + 5 + 5 + 1 + 5 + 0 + 6 + 2 + 1).

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 (455150623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7847396 + ... + 7847453.

It is an arithmetic number, because the mean of its divisors is an integer number (117711375).

Almost surely, 2^455150621 is an apocalyptic number.

It is an amenable number.

455150621 is a deficient number, since it is larger than the sum of its proper divisors (15694879).

455150621 is a wasteful number, since it uses less digits than its factorization.

455150621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15694878.

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

The square root of 455150621 is about 21334.2593262574. The cubic root of 455150621 is about 769.2220292179. Note that the first 3 decimals are identical.

The spelling of 455150621 in words is "four hundred fifty-five million, one hundred fifty thousand, six hundred twenty-one".