478219157 has 4 divisors (see below), whose sum is σ = 515005260. Its totient is φ = 441433056.

The previous prime is 478219103. The next prime is 478219177. The reversal of 478219157 is 751912874.

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 119268241 + 358950916 = 10921^2 + 18946^2 .

It is a cyclic number.

It is not a de Polignac number, because 478219157 - 2¹² = 478215061 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 (478219177) 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, 18393032 + ... + 18393057.

It is an arithmetic number, because the mean of its divisors is an integer number (128751315).

Almost surely, 2^478219157 is an apocalyptic number.

It is an amenable number.

478219157 is a deficient number, since it is larger than the sum of its proper divisors (36786103).

478219157 is a wasteful number, since it uses less digits than its factorization.

478219157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36786102.

The product of its digits is 141120, while the sum is 44.

The square root of 478219157 is about 21868.2225386518. Note that the first 3 decimals coincide. The cubic root of 478219157 is about 782.0040276217.

The spelling of 478219157 in words is "four hundred seventy-eight million, two hundred nineteen thousand, one hundred fifty-seven".