54145232461021 has 4 divisors (see below), whose sum is σ = 58310250342652. Its totient is φ = 49980214579392.

The previous prime is 54145232460961. The next prime is 54145232461027. The reversal of 54145232461021 is 12016423254145.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27205758855396 + 26939473605625 = 5215914^2 + 5190325^2 .

It is a cyclic number.

It is not a de Polignac number, because 54145232461021 - 2⁹ = 54145232460509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54145232461027) 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, 2082508940796 + ... + 2082508940821.

It is an arithmetic number, because the mean of its divisors is an integer number (14577562585663).

Almost surely, 2^{54145232461021} is an apocalyptic number.

It is an amenable number.

54145232461021 is a deficient number, since it is larger than the sum of its proper divisors (4165017881631).

54145232461021 is a wasteful number, since it uses less digits than its factorization.

54145232461021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4165017881630.

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 54145232461021 in words is "fifty-four trillion, one hundred forty-five billion, two hundred thirty-two million, four hundred sixty-one thousand, twenty-one".