51232091 has 2 divisors, whose sum is σ = 51232092. Its totient is φ = 51232090.

The previous prime is 51232073. The next prime is 51232133. The reversal of 51232091 is 19023215.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51232091 is a prime.

It is not a weakly prime, because it can be changed into another prime (51232061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25616045 + 25616046.

It is an arithmetic number, because the mean of its divisors is an integer number (25616046).

Almost surely, 2^51232091 is an apocalyptic number.

51232091 is a deficient number, since it is larger than the sum of its proper divisors (1).

51232091 is an equidigital number, since it uses as much as digits as its factorization.

51232091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 51232091 is about 7157.6596035296. The cubic root of 51232091 is about 371.4046702921.

The spelling of 51232091 in words is "fifty-one million, two hundred thirty-two thousand, ninety-one".