1650072331 has 2 divisors, whose sum is σ = 1650072332. Its totient is φ = 1650072330.

The previous prime is 1650072329. The next prime is 1650072337. The reversal of 1650072331 is 1332700561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1650072331 - 2¹ = 1650072329 is a prime.

It is a super-2 number, since 2×1650072331² = 5445477395063547122, which contains 22 as substring.

Together with 1650072329, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1650072331.

It is not a weakly prime, because it can be changed into another prime (1650072337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825036165 + 825036166.

It is an arithmetic number, because the mean of its divisors is an integer number (825036166).

Almost surely, 2^1650072331 is an apocalyptic number.

1650072331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650072331 is an equidigital number, since it uses as much as digits as its factorization.

1650072331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 1650072331 is about 40621.0823464860. The cubic root of 1650072331 is about 1181.6830170971.

Adding to 1650072331 its reverse (1332700561), we get a palindrome (2982772892).

It can be divided in two parts, 16500 and 72331, that added together give a triangular number (88831 = T₄₂₁).

The spelling of 1650072331 in words is "one billion, six hundred fifty million, seventy-two thousand, three hundred thirty-one".