106521511253 has 4 divisors (see below), whose sum is σ = 106718409228. Its totient is φ = 106324613280.

The previous prime is 106521511249. The next prime is 106521511259. The reversal of 106521511253 is 352115125601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23452472164 + 83069039089 = 153142^2 + 288217^2 .

It is a cyclic number.

It is not a de Polignac number, because 106521511253 - 2² = 106521511249 is a prime.

It is a super-2 number, since 2×106521511253² (a number of 23 digits) 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 (106521511259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98448176 + ... + 98449257.

It is an arithmetic number, because the mean of its divisors is an integer number (26679602307).

Almost surely, 2^106521511253 is an apocalyptic number.

It is an amenable number.

106521511253 is a deficient number, since it is larger than the sum of its proper divisors (196897975).

106521511253 is an equidigital number, since it uses as much as digits as its factorization.

106521511253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196897974.

The product of its (nonzero) digits is 9000, while the sum is 32.

Adding to 106521511253 its reverse (352115125601), we get a palindrome (458636636854).

The spelling of 106521511253 in words is "one hundred six billion, five hundred twenty-one million, five hundred eleven thousand, two hundred fifty-three".