54526781 has 4 divisors (see below), whose sum is σ = 54919200. Its totient is φ = 54134364.

The previous prime is 54526753. The next prime is 54526783. The reversal of 54526781 is 18762545.

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-54526781 is a prime.

It is a super-2 number, since 2×54526781² = 5946339692443922, 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 (54526783) 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, 196001 + ... + 196278.

It is an arithmetic number, because the mean of its divisors is an integer number (13729800).

Almost surely, 2^54526781 is an apocalyptic number.

It is an amenable number.

54526781 is a deficient number, since it is larger than the sum of its proper divisors (392419).

54526781 is a wasteful number, since it uses less digits than its factorization.

54526781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392418.

The product of its digits is 67200, while the sum is 38.

The square root of 54526781 is about 7384.2251455383. The cubic root of 54526781 is about 379.2014185003.

The spelling of 54526781 in words is "fifty-four million, five hundred twenty-six thousand, seven hundred eighty-one".