156501049 has 2 divisors, whose sum is σ = 156501050. Its totient is φ = 156501048.

The previous prime is 156501041. The next prime is 156501053. The reversal of 156501049 is 940105651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104040000 + 52461049 = 10200^2 + 7243^2 .

It is a cyclic number.

It is not a de Polignac number, because 156501049 - 2³ = 156501041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 156501049.

It is not a weakly prime, because it can be changed into another prime (156501041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78250524 + 78250525.

It is an arithmetic number, because the mean of its divisors is an integer number (78250525).

Almost surely, 2^156501049 is an apocalyptic number.

It is an amenable number.

156501049 is a deficient number, since it is larger than the sum of its proper divisors (1).

156501049 is an equidigital number, since it uses as much as digits as its factorization.

156501049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 156501049 is about 12510.0379295988. The cubic root of 156501049 is about 538.8969814462.

The spelling of 156501049 in words is "one hundred fifty-six million, five hundred one thousand, forty-nine".