157227478 has 4 divisors (see below), whose sum is σ = 235841220. Its totient is φ = 78613738.

The previous prime is 157227457. The next prime is 157227491. The reversal of 157227478 is 874722751.

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

It is a super-4 number, since 4×157227478⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39306868 + ... + 39306871.

It is an arithmetic number, because the mean of its divisors is an integer number (58960305).

Almost surely, 2^157227478 is an apocalyptic number.

157227478 is a deficient number, since it is larger than the sum of its proper divisors (78613742).

157227478 is an equidigital number, since it uses as much as digits as its factorization.

157227478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78613741.

The product of its digits is 219520, while the sum is 43.

The square root of 157227478 is about 12539.0381608798. The cubic root of 157227478 is about 539.7294918574.

The spelling of 157227478 in words is "one hundred fifty-seven million, two hundred twenty-seven thousand, four hundred seventy-eight".