2690445031 has 4 divisors (see below), whose sum is σ = 2690782864. Its totient is φ = 2690107200.

The previous prime is 2690444971. The next prime is 2690445061. The reversal of 2690445031 is 1305440962.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2690445031 - 2⁷ = 2690444903 is a prime.

It is a super-2 number, since 2×2690445031² = 14476988929665181922, which contains 22 as substring.

It is the 51870-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2690445061) by changing a digit.

It is a nontrivial repunit in base 51869.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156675 + ... + 172996.

It is an arithmetic number, because the mean of its divisors is an integer number (672695716).

Almost surely, 2^2690445031 is an apocalyptic number.

2690445031 is a deficient number, since it is larger than the sum of its proper divisors (337833).

2690445031 is an equidigital number, since it uses as much as digits as its factorization.

2690445031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337832.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 2690445031 is about 51869.5000072297. The cubic root of 2690445031 is about 1390.8321072246.

Adding to 2690445031 its reverse (1305440962), we get a palindrome (3995885993).

The spelling of 2690445031 in words is "two billion, six hundred ninety million, four hundred forty-five thousand, thirty-one".