33490431 has 12 divisors (see below), whose sum is σ = 52096408. Its totient is φ = 20609424.

The previous prime is 33490409. The next prime is 33490453. The reversal of 33490431 is 13409433.

It is an interprime number because it is at equal distance from previous prime (33490409) and next prime (33490453).

It is not a de Polignac number, because 33490431 - 2²³ = 25101823 is a prime.

It is a super-2 number, since 2×33490431² = 2243217937131522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33490395 and 33490404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33490031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143005 + ... + 143238.

Almost surely, 2^33490431 is an apocalyptic number.

33490431 is a deficient number, since it is larger than the sum of its proper divisors (18605977).

33490431 is a wasteful number, since it uses less digits than its factorization.

33490431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286262 (or 286259 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 33490431 is about 5787.0917566598. The cubic root of 33490431 is about 322.3345897745.

Adding to 33490431 its reverse (13409433), we get a palindrome (46899864).

The spelling of 33490431 in words is "thirty-three million, four hundred ninety thousand, four hundred thirty-one".