106821506 has 64 divisors (see below), whose sum is σ = 194088960. Its totient is φ = 43541760.

The previous prime is 106821487. The next prime is 106821551. The reversal of 106821506 is 605128601.

It is a happy number.

It is a super-2 number, since 2×106821506² = 22821668288216072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1037051 + ... + 1037153.

It is an arithmetic number, because the mean of its divisors is an integer number (3032640).

Almost surely, 2^106821506 is an apocalyptic number.

106821506 is a deficient number, since it is larger than the sum of its proper divisors (87267454).

106821506 is a wasteful number, since it uses less digits than its factorization.

106821506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 106821506 is about 10335.4489984712. The cubic root of 106821506 is about 474.4818075617.

The spelling of 106821506 in words is "one hundred six million, eight hundred twenty-one thousand, five hundred six".