511109142 has 16 divisors (see below), whose sum is σ = 1024093632. Its totient is φ = 170057160.

The previous prime is 511109129. The next prime is 511109149. The reversal of 511109142 is 241901115.

It is a happy number.

It is a super-2 number, since 2×511109142² = 522465110071952328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511109149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74584 + ... + 81147.

It is an arithmetic number, because the mean of its divisors is an integer number (64005852).

Almost surely, 2^511109142 is an apocalyptic number.

511109142 is an abundant number, since it is smaller than the sum of its proper divisors (512984490).

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

511109142 is a wasteful number, since it uses less digits than its factorization.

511109142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156283.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 511109142 is about 22607.7230609365. The cubic root of 511109142 is about 799.5357420912.

The spelling of 511109142 in words is "five hundred eleven million, one hundred nine thousand, one hundred forty-two".