2661520531 has 8 divisors (see below), whose sum is σ = 2749077504. Its totient is φ = 2574069960.

The previous prime is 2661520517. The next prime is 2661520567. The reversal of 2661520531 is 1350251662.

2661520531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2661520531 - 2¹³ = 2661512339 is a prime.

It is a super-2 number, since 2×2661520531² = 14167383073869043922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2661520493 and 2661520502.

It is not an unprimeable number, because it can be changed into a prime (2661520571) 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, 25926 + ... + 77428.

It is an arithmetic number, because the mean of its divisors is an integer number (343634688).

Almost surely, 2^2661520531 is an apocalyptic number.

2661520531 is a deficient number, since it is larger than the sum of its proper divisors (87556973).

2661520531 is a wasteful number, since it uses less digits than its factorization.

2661520531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53201.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2661520531 is about 51589.9266427081. The cubic root of 2661520531 is about 1385.8299414741.

The spelling of 2661520531 in words is "two billion, six hundred sixty-one million, five hundred twenty thousand, five hundred thirty-one".