155622697 has 4 divisors (see below), whose sum is σ = 160642816. Its totient is φ = 150602580.

The previous prime is 155622689. The next prime is 155622713. The reversal of 155622697 is 796226551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 796226551 = 2003 ⋅397517.

It is a cyclic number.

It is not a de Polignac number, because 155622697 - 2³ = 155622689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155622637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2510013 + ... + 2510074.

It is an arithmetic number, because the mean of its divisors is an integer number (40160704).

Almost surely, 2^155622697 is an apocalyptic number.

It is an amenable number.

155622697 is a deficient number, since it is larger than the sum of its proper divisors (5020119).

155622697 is an equidigital number, since it uses as much as digits as its factorization.

155622697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5020118.

The product of its digits is 226800, while the sum is 43.

The square root of 155622697 is about 12474.8826447386. The cubic root of 155622697 is about 537.8869146376.

The spelling of 155622697 in words is "one hundred fifty-five million, six hundred twenty-two thousand, six hundred ninety-seven".