540152021 has 4 divisors (see below), whose sum is σ = 549307200. Its totient is φ = 530996844.

The previous prime is 540152009. The next prime is 540152023. The reversal of 540152021 is 120251045.

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 a de Polignac number, because none of the positive numbers 2^k-540152021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 540151984 and 540152002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540152023) 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, 4577501 + ... + 4577618.

It is an arithmetic number, because the mean of its divisors is an integer number (137326800).

Almost surely, 2^540152021 is an apocalyptic number.

It is an amenable number.

540152021 is a deficient number, since it is larger than the sum of its proper divisors (9155179).

540152021 is an equidigital number, since it uses as much as digits as its factorization.

540152021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9155178.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 540152021 is about 23241.1708181838. The cubic root of 540152021 is about 814.4016941939.

The spelling of 540152021 in words is "five hundred forty million, one hundred fifty-two thousand, twenty-one".