159881402 has 4 divisors (see below), whose sum is σ = 239822106. Its totient is φ = 79940700.

The previous prime is 159881401. The next prime is 159881419. The reversal of 159881402 is 204188951.

159881402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204188951 = 103 ⋅1982417.

It can be written as a sum of positive squares in only one way, i.e., 157979761 + 1901641 = 12569^2 + 1379^2 .

It is not an unprimeable number, because it can be changed into a prime (159881401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39970349 + ... + 39970352.

Almost surely, 2^159881402 is an apocalyptic number.

159881402 is a deficient number, since it is larger than the sum of its proper divisors (79940704).

159881402 is an equidigital number, since it uses as much as digits as its factorization.

159881402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79940703.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 159881402 is about 12644.4217740472. The cubic root of 159881402 is about 542.7493549548.

The spelling of 159881402 in words is "one hundred fifty-nine million, eight hundred eighty-one thousand, four hundred two".