511142045 has 4 divisors (see below), whose sum is σ = 613370460. Its totient is φ = 408913632.

The previous prime is 511142033. The next prime is 511142101. The reversal of 511142045 is 540241115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540241115 = 5 ⋅108048223.

It can be written as a sum of positive squares in 2 ways, for example, as 370909081 + 140232964 = 19259^2 + 11842^2 .

It is a cyclic number.

It is not a de Polignac number, because 511142045 - 2²² = 506947741 is a prime.

It is a super-2 number, since 2×511142045² = 522532380333564050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 511142045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51114200 + ... + 51114209.

It is an arithmetic number, because the mean of its divisors is an integer number (153342615).

Almost surely, 2^511142045 is an apocalyptic number.

It is an amenable number.

511142045 is a deficient number, since it is larger than the sum of its proper divisors (102228415).

511142045 is a wasteful number, since it uses less digits than its factorization.

511142045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102228414.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 511142045 is about 22608.4507430297. The cubic root of 511142045 is about 799.5528986095.

The spelling of 511142045 in words is "five hundred eleven million, one hundred forty-two thousand, forty-five".