45215431 has 4 divisors (see below), whose sum is σ = 45235672. Its totient is φ = 45195192.

The previous prime is 45215411. The next prime is 45215441. The reversal of 45215431 is 13451254.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45215431 - 2⁵ = 45215399 is a prime.

It is a super-2 number, since 2×45215431² = 4088870401031522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45215396 and 45215405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45215411) 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, 6285 + ... + 11398.

It is an arithmetic number, because the mean of its divisors is an integer number (11308918).

Almost surely, 2^45215431 is an apocalyptic number.

45215431 is a deficient number, since it is larger than the sum of its proper divisors (20241).

45215431 is a wasteful number, since it uses less digits than its factorization.

45215431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20240.

The product of its digits is 2400, while the sum is 25.

The square root of 45215431 is about 6724.2420390703. The cubic root of 45215431 is about 356.2560308408.

Adding to 45215431 its reverse (13451254), we get a palindrome (58666685).

The spelling of 45215431 in words is "forty-five million, two hundred fifteen thousand, four hundred thirty-one".