340542531 has 48 divisors (see below), whose sum is σ = 590054400. Its totient is φ = 185042880.

The previous prime is 340542523. The next prime is 340542539. The reversal of 340542531 is 135245043.

340542531 is a `hidden beast` number, since 3 + 405 + 4 + 253 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (340542523) and next prime (340542539).

It is not a de Polignac number, because 340542531 - 2³ = 340542523 is a prime.

It is a super-2 number, since 2×340542531² = 231938430839771922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 340542495 and 340542504.

It is not an unprimeable number, because it can be changed into a prime (340542539) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 287761 + ... + 288941.

It is an arithmetic number, because the mean of its divisors is an integer number (12292800).

Almost surely, 2^340542531 is an apocalyptic number.

340542531 is a deficient number, since it is larger than the sum of its proper divisors (249511869).

340542531 is a wasteful number, since it uses less digits than its factorization.

340542531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416 (or 1413 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 340542531 is about 18453.7944878553. The cubic root of 340542531 is about 698.3242439273.

Adding to 340542531 its reverse (135245043), we get a palindrome (475787574).

It can be divided in two parts, 34054 and 2531, that added together give a triangular number (36585 = T₂₇₀).

The spelling of 340542531 in words is "three hundred forty million, five hundred forty-two thousand, five hundred thirty-one".