3520240061 has 12 divisors (see below), whose sum is σ = 3917277756. Its totient is φ = 3144620160.

The previous prime is 3520240037. The next prime is 3520240103. The reversal of 3520240061 is 1600420253.

It can be written as a sum of positive squares in 2 ways, for example, as 2159367961 + 1360872100 = 46469^2 + 36890^2 .

It is not a de Polignac number, because 3520240061 - 2¹⁸ = 3519977917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520260061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128396 + ... + 153381.

It is an arithmetic number, because the mean of its divisors is an integer number (326439813).

Almost surely, 2^3520240061 is an apocalyptic number.

3520240061 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3520240061 is a deficient number, since it is larger than the sum of its proper divisors (397037695).

3520240061 is a wasteful number, since it uses less digits than its factorization.

3520240061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281852 (or 281821 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 3520240061 is about 59331.6109759376. The cubic root of 3520240061 is about 1521.2155646007.

The spelling of 3520240061 in words is "three billion, five hundred twenty million, two hundred forty thousand, sixty-one".