515151660 has 48 divisors (see below), whose sum is σ = 1443409632. Its totient is φ = 137280000.

The previous prime is 515151643. The next prime is 515151673. The reversal of 515151660 is 66151515.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170160 + ... + 173160.

It is an arithmetic number, because the mean of its divisors is an integer number (30071034).

Almost surely, 2^515151660 is an apocalyptic number.

It is an amenable number.

515151660 is an abundant number, since it is smaller than the sum of its proper divisors (928257972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

515151660 is a wasteful number, since it uses less digits than its factorization.

515151660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5874 (or 5872 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 515151660 is about 22696.9526588923. The cubic root of 515151660 is about 801.6381329444.

The spelling of 515151660 in words is "five hundred fifteen million, one hundred fifty-one thousand, six hundred sixty".