781232051 has 2 divisors, whose sum is σ = 781232052. Its totient is φ = 781232050.

The previous prime is 781232029. The next prime is 781232069. The reversal of 781232051 is 150232187.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 781232051 - 2¹⁰ = 781231027 is a prime.

It is a super-2 number, since 2×781232051² = 1220647035019333202, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (781232021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390616025 + 390616026.

It is an arithmetic number, because the mean of its divisors is an integer number (390616026).

Almost surely, 2^781232051 is an apocalyptic number.

781232051 is a deficient number, since it is larger than the sum of its proper divisors (1).

781232051 is an equidigital number, since it uses as much as digits as its factorization.

781232051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 781232051 is about 27950.5286354301. The cubic root of 781232051 is about 921.0008213067. Note that the first 3 decimals are identical.

The spelling of 781232051 in words is "seven hundred eighty-one million, two hundred thirty-two thousand, fifty-one".