157195405 has 8 divisors (see below), whose sum is σ = 188956152. Its totient is φ = 125541888.

The previous prime is 157195391. The next prime is 157195421. The reversal of 157195405 is 504591751.

It can be written as a sum of positive squares in 4 ways, for example, as 60310756 + 96884649 = 7766^2 + 9843^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157195405 - 2⁵ = 157195373 is a prime.

It is a super-2 number, since 2×157195405² = 49420790706228050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23544 + ... + 29473.

It is an arithmetic number, because the mean of its divisors is an integer number (23619519).

Almost surely, 2^157195405 is an apocalyptic number.

It is an amenable number.

157195405 is a deficient number, since it is larger than the sum of its proper divisors (31760747).

157195405 is an equidigital number, since it uses as much as digits as its factorization.

157195405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53615.

The product of its (nonzero) digits is 31500, while the sum is 37.

The square root of 157195405 is about 12537.7591698038. The cubic root of 157195405 is about 539.6927893645.

The spelling of 157195405 in words is "one hundred fifty-seven million, one hundred ninety-five thousand, four hundred five".