3487511521 has 8 divisors (see below), whose sum is σ = 3759837480. Its totient is φ = 3215764992.

The previous prime is 3487511471. The next prime is 3487511527. The reversal of 3487511521 is 1251157843.

It can be written as a sum of positive squares in 4 ways, for example, as 18496 + 3487493025 = 136^2 + 59055^2 .

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 3487511521 - 2²¹ = 3485414369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3487511527) 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, 132310 + ... + 156463.

It is an arithmetic number, because the mean of its divisors is an integer number (469979685).

Almost surely, 2^3487511521 is an apocalyptic number.

It is an amenable number.

3487511521 is a deficient number, since it is larger than the sum of its proper divisors (272325959).

3487511521 is a wasteful number, since it uses less digits than its factorization.

3487511521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289715.

The product of its digits is 33600, while the sum is 37.

The square root of 3487511521 is about 59055.1565995722. The cubic root of 3487511521 is about 1516.4865063518.

The spelling of 3487511521 in words is "three billion, four hundred eighty-seven million, five hundred eleven thousand, five hundred twenty-one".