61131319 has 2 divisors, whose sum is σ = 61131320. Its totient is φ = 61131318.

The previous prime is 61131241. The next prime is 61131383. The reversal of 61131319 is 91313116.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61131319 is a prime.

It is a super-2 number, since 2×61131319² = 7474076325359522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61131293 and 61131302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61131619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30565659 + 30565660.

It is an arithmetic number, because the mean of its divisors is an integer number (30565660).

Almost surely, 2^61131319 is an apocalyptic number.

61131319 is a deficient number, since it is larger than the sum of its proper divisors (1).

61131319 is an equidigital number, since it uses as much as digits as its factorization.

61131319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 25.

The square root of 61131319 is about 7818.6519937902. The cubic root of 61131319 is about 393.9319950139.

The spelling of 61131319 in words is "sixty-one million, one hundred thirty-one thousand, three hundred nineteen".