515120387 has 2 divisors, whose sum is σ = 515120388. Its totient is φ = 515120386.

The previous prime is 515120377. The next prime is 515120393. The reversal of 515120387 is 783021515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 515120387 - 2⁴ = 515120371 is a prime.

It is not a weakly prime, because it can be changed into another prime (515120317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257560193 + 257560194.

It is an arithmetic number, because the mean of its divisors is an integer number (257560194).

Almost surely, 2^515120387 is an apocalyptic number.

515120387 is a deficient number, since it is larger than the sum of its proper divisors (1).

515120387 is an equidigital number, since it uses as much as digits as its factorization.

515120387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 515120387 is about 22696.2637233532. The cubic root of 515120387 is about 801.6219110958.

The spelling of 515120387 in words is "five hundred fifteen million, one hundred twenty thousand, three hundred eighty-seven".