1550831 has 2 divisors, whose sum is σ = 1550832. Its totient is φ = 1550830.

The previous prime is 1550827. The next prime is 1550851. The reversal of 1550831 is 1380551.

It is a weak prime.

It is an emirp because it is prime and its reverse (1380551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1550831 - 2² = 1550827 is a prime.

It is a super-2 number, since 2×1550831² = 4810153581122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1550797 and 1550806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775415 + 775416.

It is an arithmetic number, because the mean of its divisors is an integer number (775416).

2^1550831 is an apocalyptic number.

1550831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550831 is an equidigital number, since it uses as much as digits as its factorization.

1550831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1550831 is about 1245.3236527104. The cubic root of 1550831 is about 115.7501310045.

The spelling of 1550831 in words is "one million, five hundred fifty thousand, eight hundred thirty-one".