540011621 has 4 divisors (see below), whose sum is σ = 541044672. Its totient is φ = 538978572.

The previous prime is 540011617. The next prime is 540011627. The reversal of 540011621 is 126110045.

540011621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 540011621 - 2² = 540011617 is a prime.

It is a super-2 number, since 2×540011621² = 583225101630095282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 540011593 and 540011602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540011627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515741 + ... + 516786.

It is an arithmetic number, because the mean of its divisors is an integer number (135261168).

Almost surely, 2^540011621 is an apocalyptic number.

It is an amenable number.

540011621 is a deficient number, since it is larger than the sum of its proper divisors (1033051).

540011621 is a wasteful number, since it uses less digits than its factorization.

540011621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033050.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 540011621 is about 23238.1501200074. The cubic root of 540011621 is about 814.3311264638.

Adding to 540011621 its reverse (126110045), we get a palindrome (666121666).

The spelling of 540011621 in words is "five hundred forty million, eleven thousand, six hundred twenty-one".