261472431 has 16 divisors (see below), whose sum is σ = 380930688. Its totient is φ = 158215200.

The previous prime is 261472423. The next prime is 261472459. The reversal of 261472431 is 134274162.

It is not a de Polignac number, because 261472431 - 2³ = 261472423 is a prime.

It is a super-2 number, since 2×261472431² = 136735664346099522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261472411) 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, 15820 + ... + 27806.

It is an arithmetic number, because the mean of its divisors is an integer number (23808168).

Almost surely, 2^261472431 is an apocalyptic number.

261472431 is a deficient number, since it is larger than the sum of its proper divisors (119458257).

261472431 is a wasteful number, since it uses less digits than its factorization.

261472431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12662.

The product of its digits is 8064, while the sum is 30.

The square root of 261472431 is about 16170.1091833049. The cubic root of 261472431 is about 639.4530083822.

The spelling of 261472431 in words is "two hundred sixty-one million, four hundred seventy-two thousand, four hundred thirty-one".