1640100531 has 8 divisors (see below), whose sum is σ = 2187241360. Its totient is φ = 1093180032.

The previous prime is 1640100493. The next prime is 1640100533. The reversal of 1640100531 is 1350010461.

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

It is not a de Polignac number, because 1640100531 - 2⁷ = 1640100403 is a prime.

It is a super-2 number, since 2×1640100531² = 5379859503572963922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1640100498 and 1640100507.

It is not an unprimeable number, because it can be changed into a prime (1640100533) 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, 36850 + ... + 68103.

It is an arithmetic number, because the mean of its divisors is an integer number (273405170).

Almost surely, 2^1640100531 is an apocalyptic number.

1640100531 is a deficient number, since it is larger than the sum of its proper divisors (547140829).

1640100531 is a wasteful number, since it uses less digits than its factorization.

1640100531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110165.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1640100531 is about 40498.1546616633. The cubic root of 1640100531 is about 1179.2978037548.

Adding to 1640100531 its reverse (1350010461), we get a palindrome (2990110992).

The spelling of 1640100531 in words is "one billion, six hundred forty million, one hundred thousand, five hundred thirty-one".