1405224551 has 4 divisors (see below), whose sum is σ = 1453680600. Its totient is φ = 1356768504.

The previous prime is 1405224533. The next prime is 1405224559. The reversal of 1405224551 is 1554225041.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1405224551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 48456019 = 1405224551 / (1 + 4 + 0 + 5 + 2 + 2 + 4 + 5 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405224559) 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, 24227981 + ... + 24228038.

It is an arithmetic number, because the mean of its divisors is an integer number (363420150).

Almost surely, 2^1405224551 is an apocalyptic number.

1405224551 is a deficient number, since it is larger than the sum of its proper divisors (48456049).

1405224551 is an equidigital number, since it uses as much as digits as its factorization.

1405224551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48456048.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 1405224551 is about 37486.3248532048. The cubic root of 1405224551 is about 1120.0787973366.

Adding to 1405224551 its reverse (1554225041), we get a palindrome (2959449592).

The spelling of 1405224551 in words is "one billion, four hundred five million, two hundred twenty-four thousand, five hundred fifty-one".