1631752013 has 4 divisors (see below), whose sum is σ = 1658502108. Its totient is φ = 1605001920.

The previous prime is 1631752009. The next prime is 1631752027. The reversal of 1631752013 is 3102571361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3102571361 = 23 ⋅134894407.

It can be written as a sum of positive squares in 2 ways, for example, as 100360324 + 1531391689 = 10018^2 + 39133^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631752013 - 2² = 1631752009 is a prime.

It is a super-2 number, since 2×1631752013² = 5325229263859104338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631752513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13374956 + ... + 13375077.

It is an arithmetic number, because the mean of its divisors is an integer number (414625527).

Almost surely, 2^1631752013 is an apocalyptic number.

It is an amenable number.

1631752013 is a deficient number, since it is larger than the sum of its proper divisors (26750095).

1631752013 is an equidigital number, since it uses as much as digits as its factorization.

1631752013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26750094.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 1631752013 is about 40394.9503403581. The cubic root of 1631752013 is about 1177.2934263171.

The spelling of 1631752013 in words is "one billion, six hundred thirty-one million, seven hundred fifty-two thousand, thirteen".