156009481 has 2 divisors, whose sum is σ = 156009482. Its totient is φ = 156009480.

The previous prime is 156009463. The next prime is 156009499. The reversal of 156009481 is 184900651.

It is a balanced prime because it is at equal distance from previous prime (156009463) and next prime (156009499).

It can be written as a sum of positive squares in only one way, i.e., 155750400 + 259081 = 12480^2 + 509^2 .

It is a cyclic number.

It is not a de Polignac number, because 156009481 - 2⁵ = 156009449 is a prime.

It is a super-2 number, since 2×156009481² = 48677916323778722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (156009421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78004740 + 78004741.

It is an arithmetic number, because the mean of its divisors is an integer number (78004741).

Almost surely, 2^156009481 is an apocalyptic number.

It is an amenable number.

156009481 is a deficient number, since it is larger than the sum of its proper divisors (1).

156009481 is an equidigital number, since it uses as much as digits as its factorization.

156009481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 156009481 is about 12490.3755347868. The cubic root of 156009481 is about 538.3321665944.

The spelling of 156009481 in words is "one hundred fifty-six million, nine thousand, four hundred eighty-one".