1687055531 has 8 divisors (see below), whose sum is σ = 1928325600. Its totient is φ = 1445851008.

The previous prime is 1687055527. The next prime is 1687055533. The reversal of 1687055531 is 1355507861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1687055531 - 2² = 1687055527 is a prime.

It is a super-2 number, since 2×1687055531² = 5692312729355383922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1687055533) 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, 67235 + ... + 88851.

It is an arithmetic number, because the mean of its divisors is an integer number (241040700).

Almost surely, 2^1687055531 is an apocalyptic number.

1687055531 is a deficient number, since it is larger than the sum of its proper divisors (241270069).

1687055531 is a wasteful number, since it uses less digits than its factorization.

1687055531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32773.

The product of its (nonzero) digits is 126000, while the sum is 41.

The square root of 1687055531 is about 41073.7815522262. The cubic root of 1687055531 is about 1190.4462537892.

The spelling of 1687055531 in words is "one billion, six hundred eighty-seven million, fifty-five thousand, five hundred thirty-one".