156339481 has 2 divisors, whose sum is σ = 156339482. Its totient is φ = 156339480.

The previous prime is 156339367. The next prime is 156339503. The reversal of 156339481 is 184933651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121352256 + 34987225 = 11016^2 + 5915^2 .

It is a cyclic number.

It is not a de Polignac number, because 156339481 - 2⁹ = 156338969 is a prime.

It is a super-2 number, since 2×156339481² = 48884066638698722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (156339181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78169740 + 78169741.

It is an arithmetic number, because the mean of its divisors is an integer number (78169741).

Almost surely, 2^156339481 is an apocalyptic number.

It is an amenable number.

156339481 is a deficient number, since it is larger than the sum of its proper divisors (1).

156339481 is an equidigital number, since it uses as much as digits as its factorization.

156339481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 156339481 is about 12503.5787277083. The cubic root of 156339481 is about 538.7114694049.

The spelling of 156339481 in words is "one hundred fifty-six million, three hundred thirty-nine thousand, four hundred eighty-one".