101320551 has 12 divisors (see below), whose sum is σ = 151772712. Its totient is φ = 67546872.

The previous prime is 101320529. The next prime is 101320603. The reversal of 101320551 is 155023101.

It is not a de Polignac number, because 101320551 - 2⁹ = 101320039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101320501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208236 + ... + 208721.

It is an arithmetic number, because the mean of its divisors is an integer number (12647726).

Almost surely, 2^101320551 is an apocalyptic number.

101320551 is a deficient number, since it is larger than the sum of its proper divisors (50452161).

101320551 is an frugal number, since it uses more digits than its factorization.

101320551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416972 (or 416960 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 101320551 is about 10065.8109956426. The cubic root of 101320551 is about 466.1931067391.

Adding to 101320551 its reverse (155023101), we get a palindrome (256343652).

The spelling of 101320551 in words is "one hundred one million, three hundred twenty thousand, five hundred fifty-one".