106531551 has 32 divisors (see below), whose sum is σ = 180864000. Its totient is φ = 60708960.

The previous prime is 106531543. The next prime is 106531567. The reversal of 106531551 is 155135601.

106531551 is a `hidden beast` number, since 1 + 0 + 653 + 1 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 106531551 - 2³ = 106531543 is a prime.

It is a super-2 number, since 2×106531551² = 22697942716931202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106531591) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112741 + ... + 113681.

It is an arithmetic number, because the mean of its divisors is an integer number (5652000).

Almost surely, 2^106531551 is an apocalyptic number.

106531551 is a deficient number, since it is larger than the sum of its proper divisors (74332449).

106531551 is an equidigital number, since it uses as much as digits as its factorization.

106531551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 106531551 is about 10321.4122580197. The cubic root of 106531551 is about 474.0521093168.

The spelling of 106531551 in words is "one hundred six million, five hundred thirty-one thousand, five hundred fifty-one".