31161419 has 2 divisors, whose sum is σ = 31161420. Its totient is φ = 31161418.

The previous prime is 31161409. The next prime is 31161433. The reversal of 31161419 is 91416113.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31161419 is a prime.

It is a super-2 number, since 2×31161419² = 1942068068187122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31161409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15580709 + 15580710.

It is an arithmetic number, because the mean of its divisors is an integer number (15580710).

Almost surely, 2^31161419 is an apocalyptic number.

31161419 is a deficient number, since it is larger than the sum of its proper divisors (1).

31161419 is an equidigital number, since it uses as much as digits as its factorization.

31161419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 26.

The square root of 31161419 is about 5582.2413957119. The cubic root of 31161419 is about 314.6823673150.

The spelling of 31161419 in words is "thirty-one million, one hundred sixty-one thousand, four hundred nineteen".