1225451431 has 16 divisors (see below), whose sum is σ = 1289253888. Its totient is φ = 1162576800.

The previous prime is 1225451429. The next prime is 1225451449. The reversal of 1225451431 is 1341545221.

It is a cyclic number.

It is not a de Polignac number, because 1225451431 - 2¹ = 1225451429 is a prime.

It is a super-2 number, since 2×1225451431² = 3003462419479895522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225451431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225451401) 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, 2623860 + ... + 2624326.

It is an arithmetic number, because the mean of its divisors is an integer number (80578368).

Almost surely, 2^1225451431 is an apocalyptic number.

1225451431 is a deficient number, since it is larger than the sum of its proper divisors (63802457).

1225451431 is a wasteful number, since it uses less digits than its factorization.

1225451431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182.

The product of its digits is 4800, while the sum is 28.

The square root of 1225451431 is about 35006.4484202554. The cubic root of 1225451431 is about 1070.1188999383.

Adding to 1225451431 its reverse (1341545221), we get a palindrome (2566996652).

The spelling of 1225451431 in words is "one billion, two hundred twenty-five million, four hundred fifty-one thousand, four hundred thirty-one".