155330997 has 8 divisors (see below), whose sum is σ = 207165600. Its totient is φ = 103525200.

The previous prime is 155330993. The next prime is 155330999. The reversal of 155330997 is 799033551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155330997 - 2² = 155330993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155330993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17122 + ... + 24572.

It is an arithmetic number, because the mean of its divisors is an integer number (25895700).

Almost surely, 2^155330997 is an apocalyptic number.

It is an amenable number.

155330997 is a deficient number, since it is larger than the sum of its proper divisors (51834603).

155330997 is an equidigital number, since it uses as much as digits as its factorization.

155330997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14403.

The product of its (nonzero) digits is 127575, while the sum is 42.

The square root of 155330997 is about 12463.1856681990. The cubic root of 155330997 is about 537.5506317547.

The spelling of 155330997 in words is "one hundred fifty-five million, three hundred thirty thousand, nine hundred ninety-seven".