155447914 has 4 divisors (see below), whose sum is σ = 233171874. Its totient is φ = 77723956.

The previous prime is 155447891. The next prime is 155447921. The reversal of 155447914 is 419744551.

It is a happy number.

155447914 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 419744551 = 197 ⋅2130683.

It can be written as a sum of positive squares in only one way, i.e., 134444025 + 21003889 = 11595^2 + 4583^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38861977 + ... + 38861980.

Almost surely, 2^155447914 is an apocalyptic number.

155447914 is a deficient number, since it is larger than the sum of its proper divisors (77723960).

155447914 is an equidigital number, since it uses as much as digits as its factorization.

155447914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77723959.

The product of its digits is 100800, while the sum is 40.

The square root of 155447914 is about 12467.8752800948. The cubic root of 155447914 is about 537.6854686435.

The spelling of 155447914 in words is "one hundred fifty-five million, four hundred forty-seven thousand, nine hundred fourteen".