54378557 has 4 divisors (see below), whose sum is σ = 56132736. Its totient is φ = 52624380.

The previous prime is 54378547. The next prime is 54378559. The reversal of 54378557 is 75587345.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75587345 = 5 ⋅15117469.

It is a cyclic number.

It is not a de Polignac number, because 54378557 - 2⁸ = 54378301 is a prime.

It is a super-2 number, since 2×54378557² = 5914054922804498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54378559) 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, 877043 + ... + 877104.

It is an arithmetic number, because the mean of its divisors is an integer number (14033184).

Almost surely, 2^54378557 is an apocalyptic number.

It is an amenable number.

54378557 is a deficient number, since it is larger than the sum of its proper divisors (1754179).

54378557 is a wasteful number, since it uses less digits than its factorization.

54378557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754178.

The product of its digits is 588000, while the sum is 44.

The square root of 54378557 is about 7374.1817851203. The cubic root of 54378557 is about 378.8575033493.

The spelling of 54378557 in words is "fifty-four million, three hundred seventy-eight thousand, five hundred fifty-seven".