996551431 has 2 divisors, whose sum is σ = 996551432. Its totient is φ = 996551430.

The previous prime is 996551419. The next prime is 996551461. The reversal of 996551431 is 134155699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 996551431 - 2⁵ = 996551399 is a prime.

It is a super-2 number, since 2×996551431² = 1986229509256295522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996551401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498275715 + 498275716.

It is an arithmetic number, because the mean of its divisors is an integer number (498275716).

Almost surely, 2^996551431 is an apocalyptic number.

996551431 is a deficient number, since it is larger than the sum of its proper divisors (1).

996551431 is an equidigital number, since it uses as much as digits as its factorization.

996551431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 43.

The square root of 996551431 is about 31568.2028471689. The cubic root of 996551431 is about 998.8491530594.

The spelling of 996551431 in words is "nine hundred ninety-six million, five hundred fifty-one thousand, four hundred thirty-one".