261341950 has 12 divisors (see below), whose sum is σ = 486096120. Its totient is φ = 104536760.

The previous prime is 261341933. The next prime is 261341957. The reversal of 261341950 is 59143162.

It is a super-2 number, since 2×261341950² = 136599229659605000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261341957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2613370 + ... + 2613469.

It is an arithmetic number, because the mean of its divisors is an integer number (40508010).

Almost surely, 2^261341950 is an apocalyptic number.

261341950 is a deficient number, since it is larger than the sum of its proper divisors (224754170).

261341950 is a wasteful number, since it uses less digits than its factorization.

261341950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5226851 (or 5226846 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 261341950 is about 16166.0740441209. The cubic root of 261341950 is about 639.3466232329.

The spelling of 261341950 in words is "two hundred sixty-one million, three hundred forty-one thousand, nine hundred fifty".