511561542 has 16 divisors (see below), whose sum is σ = 1027371312. Its totient is φ = 169812480.

The previous prime is 511561541. The next prime is 511561553. The reversal of 511561542 is 245165115.

It is a super-2 number, since 2×511561542² = 523390422506835528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511561541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175443 + ... + 178334.

It is an arithmetic number, because the mean of its divisors is an integer number (64210707).

Almost surely, 2^511561542 is an apocalyptic number.

511561542 is an abundant number, since it is smaller than the sum of its proper divisors (515809770).

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

511561542 is a wasteful number, since it uses less digits than its factorization.

511561542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354023.

The product of its digits is 6000, while the sum is 30.

The square root of 511561542 is about 22617.7262782977. The cubic root of 511561542 is about 799.7715712399.

The spelling of 511561542 in words is "five hundred eleven million, five hundred sixty-one thousand, five hundred forty-two".