61263381 has 8 divisors (see below), whose sum is σ = 81837664. Its totient is φ = 40765680.

The previous prime is 61263373. The next prime is 61263431. The reversal of 61263381 is 18336216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61263381 - 2³ = 61263373 is a prime.

It is a super-2 number, since 2×61263381² = 7506403703102322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61263311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17251 + ... + 20496.

It is an arithmetic number, because the mean of its divisors is an integer number (10229708).

Almost surely, 2^61263381 is an apocalyptic number.

It is an amenable number.

61263381 is a deficient number, since it is larger than the sum of its proper divisors (20574283).

61263381 is a wasteful number, since it uses less digits than its factorization.

61263381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38291.

The product of its digits is 5184, while the sum is 30.

The square root of 61263381 is about 7827.0927552955. The cubic root of 61263381 is about 394.2154614421.

Adding to 61263381 its reverse (18336216), we get a palindrome (79599597).

The spelling of 61263381 in words is "sixty-one million, two hundred sixty-three thousand, three hundred eighty-one".