106021551 has 8 divisors (see below), whose sum is σ = 141814960. Its totient is φ = 70454592.

The previous prime is 106021543. The next prime is 106021589. The reversal of 106021551 is 155120601.

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

It is not a de Polignac number, because 106021551 - 2³ = 106021543 is a prime.

It is a super-2 number, since 2×106021551² = 22481138552891202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106021511) 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, 55516 + ... + 57393.

It is an arithmetic number, because the mean of its divisors is an integer number (17726870).

Almost surely, 2^106021551 is an apocalyptic number.

106021551 is a deficient number, since it is larger than the sum of its proper divisors (35793409).

106021551 is a wasteful number, since it uses less digits than its factorization.

106021551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113225.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 106021551 is about 10296.6766968765. The cubic root of 106021551 is about 473.2944201407.

The spelling of 106021551 in words is "one hundred six million, twenty-one thousand, five hundred fifty-one".