156401061331 has 2 divisors, whose sum is σ = 156401061332. Its totient is φ = 156401061330.

The previous prime is 156401061329. The next prime is 156401061431. The reversal of 156401061331 is 133160104651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 156401061331 - 2¹ = 156401061329 is a prime.

It is a super-2 number, since 2×156401061331² (a number of 23 digits) contains 22 as substring.

Together with 156401061329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 156401061293 and 156401061302.

It is not a weakly prime, because it can be changed into another prime (156401061431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78200530665 + 78200530666.

It is an arithmetic number, because the mean of its divisors is an integer number (78200530666).

Almost surely, 2^156401061331 is an apocalyptic number.

156401061331 is a deficient number, since it is larger than the sum of its proper divisors (1).

156401061331 is an equidigital number, since it uses as much as digits as its factorization.

156401061331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 156401061331 its reverse (133160104651), we get a palindrome (289561165982).

The spelling of 156401061331 in words is "one hundred fifty-six billion, four hundred one million, sixty-one thousand, three hundred thirty-one".