351402521161 has 4 divisors (see below), whose sum is σ = 351672624324. Its totient is φ = 351132418000.

The previous prime is 351402521143. The next prime is 351402521179. The reversal of 351402521161 is 161125204153.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161125204153 = 43 ⋅3747097771.

It is an interprime number because it is at equal distance from previous prime (351402521143) and next prime (351402521179).

It can be written as a sum of positive squares in 2 ways, for example, as 165356089600 + 186046431561 = 406640^2 + 431331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-351402521161 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (351402521101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135049630 + ... + 135052231.

It is an arithmetic number, because the mean of its divisors is an integer number (87918156081).

Almost surely, 2^351402521161 is an apocalyptic number.

It is an amenable number.

351402521161 is a deficient number, since it is larger than the sum of its proper divisors (270103163).

351402521161 is a wasteful number, since it uses less digits than its factorization.

351402521161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270103162.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 351402521161 in words is "three hundred fifty-one billion, four hundred two million, five hundred twenty-one thousand, one hundred sixty-one".