45215511 has 16 divisors (see below), whose sum is σ = 65889408. Its totient is φ = 27352800.

The previous prime is 45215507. The next prime is 45215531. The reversal of 45215511 is 11551254.

It is not a de Polignac number, because 45215511 - 2² = 45215507 is a prime.

It is a super-2 number, since 2×45215511² = 4088884869982242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45215531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25101 + ... + 26841.

It is an arithmetic number, because the mean of its divisors is an integer number (4118088).

Almost surely, 2^45215511 is an apocalyptic number.

45215511 is a deficient number, since it is larger than the sum of its proper divisors (20673897).

45215511 is a wasteful number, since it uses less digits than its factorization.

45215511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542.

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

The square root of 45215511 is about 6724.2479876935. The cubic root of 45215511 is about 356.2562409495.

Adding to 45215511 its reverse (11551254), we get a palindrome (56766765).

The spelling of 45215511 in words is "forty-five million, two hundred fifteen thousand, five hundred eleven".