131222400078 has 64 divisors (see below), whose sum is σ = 331812495360. Its totient is φ = 33603679200.

The previous prime is 131222400031. The next prime is 131222400079. The reversal of 131222400078 is 870004222131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131222400079) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1967418 + ... + 2033021.

It is an arithmetic number, because the mean of its divisors is an integer number (5184570240).

Almost surely, 2^131222400078 is an apocalyptic number.

131222400078 is an abundant number, since it is smaller than the sum of its proper divisors (200590095282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131222400078 is a wasteful number, since it uses less digits than its factorization.

131222400078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000533.

The product of its (nonzero) digits is 5376, while the sum is 30.

The spelling of 131222400078 in words is "one hundred thirty-one billion, two hundred twenty-two million, four hundred thousand, seventy-eight".