545215402 has 4 divisors (see below), whose sum is σ = 817823106. Its totient is φ = 272607700.

The previous prime is 545215379. The next prime is 545215409. The reversal of 545215402 is 204512545.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 545175801 + 39601 = 23349^2 + 199^2 .

It is not an unprimeable number, because it can be changed into a prime (545215409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136303849 + ... + 136303852.

Almost surely, 2^545215402 is an apocalyptic number.

545215402 is a deficient number, since it is larger than the sum of its proper divisors (272607704).

545215402 is a wasteful number, since it uses less digits than its factorization.

545215402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272607703.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 545215402 is about 23349.8480080706. The cubic root of 545215402 is about 816.9385157082.

Adding to 545215402 its reverse (204512545), we get a palindrome (749727947).

The spelling of 545215402 in words is "five hundred forty-five million, two hundred fifteen thousand, four hundred two".