345961531 has 16 divisors (see below), whose sum is σ = 359941120. Its totient is φ = 332307360.

The previous prime is 345961523. The next prime is 345961541. The reversal of 345961531 is 135169543.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 345961531 - 2³ = 345961523 is a prime.

It is a super-2 number, since 2×345961531² = 239378761863727922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345961541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1045036 + ... + 1045366.

It is an arithmetic number, because the mean of its divisors is an integer number (22496320).

Almost surely, 2^345961531 is an apocalyptic number.

345961531 is a deficient number, since it is larger than the sum of its proper divisors (13979589).

345961531 is a wasteful number, since it uses less digits than its factorization.

345961531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706.

The product of its digits is 48600, while the sum is 37.

The square root of 345961531 is about 18600.0411558684. The cubic root of 345961531 is about 702.0088763038.

The spelling of 345961531 in words is "three hundred forty-five million, nine hundred sixty-one thousand, five hundred thirty-one".