515255101551 has 12 divisors (see below), whose sum is σ = 744288829128. Its totient is φ = 343488880944.

The previous prime is 515255101531. The next prime is 515255101561. The reversal of 515255101551 is 155101552515.

515255101551 is a `hidden beast` number, since 5 + 1 + 52 + 5 + 51 + 0 + 1 + 551 = 666.

It is not a de Polignac number, because 515255101551 - 2⁷ = 515255101423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515255101531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 983025 + ... + 1413098.

It is an arithmetic number, because the mean of its divisors is an integer number (62024069094).

Almost surely, 2^515255101551 is an apocalyptic number.

515255101551 is a deficient number, since it is larger than the sum of its proper divisors (229033727577).

515255101551 is a wasteful number, since it uses less digits than its factorization.

515255101551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420022 (or 2420019 counting only the distinct ones).

The product of its (nonzero) digits is 31250, while the sum is 36.

The spelling of 515255101551 in words is "five hundred fifteen billion, two hundred fifty-five million, one hundred one thousand, five hundred fifty-one".