131356436 has 6 divisors (see below), whose sum is σ = 229873770. Its totient is φ = 65678216.

The previous prime is 131356429. The next prime is 131356441. The reversal of 131356436 is 634653131.

It can be written as a sum of positive squares in only one way, i.e., 117592336 + 13764100 = 10844^2 + 3710^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16419551 + ... + 16419558.

It is an arithmetic number, because the mean of its divisors is an integer number (38312295).

Almost surely, 2^131356436 is an apocalyptic number.

It is an amenable number.

131356436 is a deficient number, since it is larger than the sum of its proper divisors (98517334).

131356436 is a wasteful number, since it uses less digits than its factorization.

131356436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32839113 (or 32839111 counting only the distinct ones).

The product of its digits is 19440, while the sum is 32.

The square root of 131356436 is about 11461.0835438889. The cubic root of 131356436 is about 508.3355141953.

The spelling of 131356436 in words is "one hundred thirty-one million, three hundred fifty-six thousand, four hundred thirty-six".