261469131 has 32 divisors (see below), whose sum is σ = 443916288. Its totient is φ = 132932640.

The previous prime is 261469123. The next prime is 261469141. The reversal of 261469131 is 131964162.

It is not a de Polignac number, because 261469131 - 2³ = 261469123 is a prime.

It is a super-2 number, since 2×261469131² = 136732212931790322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 261469092 and 261469101.

It is not an unprimeable number, because it can be changed into a prime (261469141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1185 + ... + 22898.

It is an arithmetic number, because the mean of its divisors is an integer number (13872384).

Almost surely, 2^261469131 is an apocalyptic number.

261469131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

261469131 is a deficient number, since it is larger than the sum of its proper divisors (182447157).

261469131 is a wasteful number, since it uses less digits than its factorization.

261469131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24151.

The product of its digits is 7776, while the sum is 33.

The square root of 261469131 is about 16170.0071428556. The cubic root of 261469131 is about 639.4503182275.

The spelling of 261469131 in words is "two hundred sixty-one million, four hundred sixty-nine thousand, one hundred thirty-one".