2172435631 has 2 divisors, whose sum is σ = 2172435632. Its totient is φ = 2172435630.

The previous prime is 2172435613. The next prime is 2172435647. The reversal of 2172435631 is 1365342712.

Together with previous prime (2172435613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2172435631 - 2⁹ = 2172435119 is a prime.

It is a super-2 number, since 2×2172435631² = 9438953141676736322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172435611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086217815 + 1086217816.

It is an arithmetic number, because the mean of its divisors is an integer number (1086217816).

Almost surely, 2^2172435631 is an apocalyptic number.

2172435631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172435631 is an equidigital number, since it uses as much as digits as its factorization.

2172435631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 2172435631 is about 46609.3942354972. The cubic root of 2172435631 is about 1295.1367865331.

The spelling of 2172435631 in words is "two billion, one hundred seventy-two million, four hundred thirty-five thousand, six hundred thirty-one".