54215511 has 24 divisors (see below), whose sum is σ = 84391920. Its totient is φ = 30868992.

The previous prime is 54215461. The next prime is 54215527. The reversal of 54215511 is 11551245.

It is not a de Polignac number, because 54215511 - 2¹⁰ = 54214487 is a prime.

It is a super-2 number, since 2×54215511² = 5878643265982242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54215011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57895 + ... + 58823.

It is an arithmetic number, because the mean of its divisors is an integer number (3516330).

Almost surely, 2^54215511 is an apocalyptic number.

54215511 is a deficient number, since it is larger than the sum of its proper divisors (30176409).

54215511 is a wasteful number, since it uses less digits than its factorization.

54215511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1336 counting only the distinct ones).

The product of its digits is 1000, while the sum is 24.

The square root of 54215511 is about 7363.1182932233. The cubic root of 54215511 is about 378.4784750202.

Adding to 54215511 its reverse (11551245), we get a palindrome (65766756).

The spelling of 54215511 in words is "fifty-four million, two hundred fifteen thousand, five hundred eleven".