54021445 has 4 divisors (see below), whose sum is σ = 64825740. Its totient is φ = 43217152.

The previous prime is 54021439. The next prime is 54021467. The reversal of 54021445 is 54412045.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54412045 = 5 ⋅10882409.

It can be written as a sum of positive squares in 2 ways, for example, as 29746116 + 24275329 = 5454^2 + 4927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54021445 is a prime.

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, 5402140 + ... + 5402149.

It is an arithmetic number, because the mean of its divisors is an integer number (16206435).

Almost surely, 2^54021445 is an apocalyptic number.

It is an amenable number.

54021445 is a deficient number, since it is larger than the sum of its proper divisors (10804295).

54021445 is a wasteful number, since it uses less digits than its factorization.

54021445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10804294.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 54021445 is about 7349.9282309421. The cubic root of 54021445 is about 378.0263435444.

The spelling of 54021445 in words is "fifty-four million, twenty-one thousand, four hundred forty-five".