651140381 has 2 divisors, whose sum is σ = 651140382. Its totient is φ = 651140380.

The previous prime is 651140323. The next prime is 651140401. The reversal of 651140381 is 183041156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 573171481 + 77968900 = 23941^2 + 8830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651140381 is a prime.

It is a super-2 number, since 2×651140381² = 847967591537650322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651140081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325570190 + 325570191.

It is an arithmetic number, because the mean of its divisors is an integer number (325570191).

Almost surely, 2^651140381 is an apocalyptic number.

It is an amenable number.

651140381 is a deficient number, since it is larger than the sum of its proper divisors (1).

651140381 is an equidigital number, since it uses as much as digits as its factorization.

651140381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 651140381 is about 25517.4524786468. The cubic root of 651140381 is about 866.7453953299.

The spelling of 651140381 in words is "six hundred fifty-one million, one hundred forty thousand, three hundred eighty-one".