155332906 has 4 divisors (see below), whose sum is σ = 232999362. Its totient is φ = 77666452.

The previous prime is 155332873. The next prime is 155332907. The reversal of 155332906 is 609233551.

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 only one way, i.e., 151068681 + 4264225 = 12291^2 + 2065^2 .

It is not an unprimeable number, because it can be changed into a prime (155332907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38833225 + ... + 38833228.

Almost surely, 2^155332906 is an apocalyptic number.

155332906 is a deficient number, since it is larger than the sum of its proper divisors (77666456).

155332906 is an equidigital number, since it uses as much as digits as its factorization.

155332906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77666455.

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 155332906 is about 12463.2622535193. The cubic root of 155332906 is about 537.5528338907.

The spelling of 155332906 in words is "one hundred fifty-five million, three hundred thirty-two thousand, nine hundred six".