345857131 has 2 divisors, whose sum is σ = 345857132. Its totient is φ = 345857130.

The previous prime is 345857101. The next prime is 345857201. The reversal of 345857131 is 131758543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345857131 - 2¹⁹ = 345332843 is a prime.

It is a super-2 number, since 2×345857131² = 239234310127102322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (345857101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172928565 + 172928566.

It is an arithmetic number, because the mean of its divisors is an integer number (172928566).

Almost surely, 2^345857131 is an apocalyptic number.

345857131 is a deficient number, since it is larger than the sum of its proper divisors (1).

345857131 is an equidigital number, since it uses as much as digits as its factorization.

345857131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 345857131 is about 18597.2344987097. The cubic root of 345857131 is about 701.9382546754.

It can be divided in two parts, 345 and 857131, that added together give a square (857476 = 926²).

The spelling of 345857131 in words is "three hundred forty-five million, eight hundred fifty-seven thousand, one hundred thirty-one".