101555551 has 8 divisors (see below), whose sum is σ = 109387520. Its totient is φ = 93972312.

The previous prime is 101555537. The next prime is 101555567. The reversal of 101555551 is 155555101.

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

It is a cyclic number.

It is not a de Polignac number, because 101555551 - 2¹¹ = 101553503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101555521) 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, 61335 + ... + 62968.

It is an arithmetic number, because the mean of its divisors is an integer number (13673440).

Almost surely, 2^101555551 is an apocalyptic number.

101555551 is a deficient number, since it is larger than the sum of its proper divisors (7831969).

101555551 is a wasteful number, since it uses less digits than its factorization.

101555551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124365.

The product of its (nonzero) digits is 3125, while the sum is 28.

The square root of 101555551 is about 10077.4774125274. The cubic root of 101555551 is about 466.5532534487.

The spelling of 101555551 in words is "one hundred one million, five hundred fifty-five thousand, five hundred fifty-one".