1631606431 has 16 divisors (see below), whose sum is σ = 2046026304. Its totient is φ = 1266580224.

The previous prime is 1631606413. The next prime is 1631606461. The reversal of 1631606431 is 1346061361.

It is not a de Polignac number, because 1631606431 - 2⁷ = 1631606303 is a prime.

It is a super-2 number, since 2×1631606431² = 5324279091361115522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1631606393 and 1631606402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631606411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164326 + ... + 173971.

It is an arithmetic number, because the mean of its divisors is an integer number (127876644).

Almost surely, 2^1631606431 is an apocalyptic number.

1631606431 is a deficient number, since it is larger than the sum of its proper divisors (414419873).

1631606431 is a wasteful number, since it uses less digits than its factorization.

1631606431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338370.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 1631606431 is about 40393.1483175055. The cubic root of 1631606431 is about 1177.2584132702.

Adding to 1631606431 its reverse (1346061361), we get a palindrome (2977667792).

The spelling of 1631606431 in words is "one billion, six hundred thirty-one million, six hundred six thousand, four hundred thirty-one".