1961354231 has 2 divisors, whose sum is σ = 1961354232. Its totient is φ = 1961354230.

The previous prime is 1961354189. The next prime is 1961354237. The reversal of 1961354231 is 1324531691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961354231 is a prime.

It is a super-2 number, since 2×1961354231² = 7693820838923202722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1961354191 and 1961354200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961354237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980677115 + 980677116.

It is an arithmetic number, because the mean of its divisors is an integer number (980677116).

Almost surely, 2^1961354231 is an apocalyptic number.

1961354231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961354231 is an equidigital number, since it uses as much as digits as its factorization.

1961354231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 1961354231 is about 44287.1790815355. The cubic root of 1961354231 is about 1251.7531094165.

The spelling of 1961354231 in words is "one billion, nine hundred sixty-one million, three hundred fifty-four thousand, two hundred thirty-one".