156261481 has 2 divisors, whose sum is σ = 156261482. Its totient is φ = 156261480.

The previous prime is 156261461. The next prime is 156261509. The reversal of 156261481 is 184162651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105267600 + 50993881 = 10260^2 + 7141^2 .

It is a cyclic number.

It is not a de Polignac number, because 156261481 - 2¹³ = 156253289 is a prime.

It is a super-2 number, since 2×156261481² = 48835300888626722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (156261401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78130740 + 78130741.

It is an arithmetic number, because the mean of its divisors is an integer number (78130741).

Almost surely, 2^156261481 is an apocalyptic number.

It is an amenable number.

156261481 is a deficient number, since it is larger than the sum of its proper divisors (1).

156261481 is an equidigital number, since it uses as much as digits as its factorization.

156261481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 34.

The square root of 156261481 is about 12500.4592315643. The cubic root of 156261481 is about 538.6218642194.

The spelling of 156261481 in words is "one hundred fifty-six million, two hundred sixty-one thousand, four hundred eighty-one".