65541531 has 16 divisors (see below), whose sum is σ = 96485760. Its totient is φ = 39241920.

The previous prime is 65541523. The next prime is 65541551. The reversal of 65541531 is 13514556.

It is not a de Polignac number, because 65541531 - 2³ = 65541523 is a prime.

It is a super-2 number, since 2×65541531² = 8591384571647922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65541521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9226 + ... + 14703.

It is an arithmetic number, because the mean of its divisors is an integer number (6030360).

Almost surely, 2^65541531 is an apocalyptic number.

65541531 is a deficient number, since it is larger than the sum of its proper divisors (30944229).

65541531 is a wasteful number, since it uses less digits than its factorization.

65541531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24026.

The product of its digits is 9000, while the sum is 30.

The square root of 65541531 is about 8095.7724152795. The cubic root of 65541531 is about 403.1860778077.

The spelling of 65541531 in words is "sixty-five million, five hundred forty-one thousand, five hundred thirty-one".