131451223604 has 6 divisors (see below), whose sum is σ = 230039641314. Its totient is φ = 65725611800.

The previous prime is 131451223571. The next prime is 131451223609. The reversal of 131451223604 is 406322154131.

It can be written as a sum of positive squares in only one way, i.e., 71959135504 + 59492088100 = 268252^2 + 243910^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131451223609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16431402947 + ... + 16431402954.

It is an arithmetic number, because the mean of its divisors is an integer number (38339940219).

Almost surely, 2^131451223604 is an apocalyptic number.

It is an amenable number.

131451223604 is a deficient number, since it is larger than the sum of its proper divisors (98588417710).

131451223604 is a wasteful number, since it uses less digits than its factorization.

131451223604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32862805905 (or 32862805903 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 131451223604 its reverse (406322154131), we get a palindrome (537773377735).

The spelling of 131451223604 in words is "one hundred thirty-one billion, four hundred fifty-one million, two hundred twenty-three thousand, six hundred four".