101397155 has 4 divisors (see below), whose sum is σ = 121676592. Its totient is φ = 81117720.

The previous prime is 101397113. The next prime is 101397157. The reversal of 101397155 is 551793101.

It is a happy number.

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

It is not a de Polignac number, because 101397155 - 2¹² = 101393059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101397157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10139711 + ... + 10139720.

It is an arithmetic number, because the mean of its divisors is an integer number (30419148).

Almost surely, 2^101397155 is an apocalyptic number.

101397155 is a deficient number, since it is larger than the sum of its proper divisors (20279437).

101397155 is an equidigital number, since it uses as much as digits as its factorization.

101397155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20279436.

The product of its (nonzero) digits is 4725, while the sum is 32.

The square root of 101397155 is about 10069.6154345635. The cubic root of 101397155 is about 466.3105664910.

The spelling of 101397155 in words is "one hundred one million, three hundred ninety-seven thousand, one hundred fifty-five".