156031481 has 2 divisors, whose sum is σ = 156031482. Its totient is φ = 156031480.

The previous prime is 156031373. The next prime is 156031487. The reversal of 156031481 is 184130651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156025081 + 6400 = 12491^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 156031481 - 2²² = 151837177 is a prime.

It is a super-2 number, since 2×156031481² = 48691646126106722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156031487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78015740 + 78015741.

It is an arithmetic number, because the mean of its divisors is an integer number (78015741).

Almost surely, 2^156031481 is an apocalyptic number.

It is an amenable number.

156031481 is a deficient number, since it is larger than the sum of its proper divisors (1).

156031481 is an equidigital number, since it uses as much as digits as its factorization.

156031481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 156031481 is about 12491.2561818257. The cubic root of 156031481 is about 538.3574700801.

The spelling of 156031481 in words is "one hundred fifty-six million, thirty-one thousand, four hundred eighty-one".