61038381 has 16 divisors (see below), whose sum is σ = 88276608. Its totient is φ = 37363200.

The previous prime is 61038377. The next prime is 61038401. The reversal of 61038381 is 18383016.

It is not a de Polignac number, because 61038381 - 2² = 61038377 is a prime.

It is a super-2 number, since 2×61038381² = 7451367910202322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61038331) 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, 12505 + ... + 16686.

It is an arithmetic number, because the mean of its divisors is an integer number (5517288).

Almost surely, 2^61038381 is an apocalyptic number.

It is an amenable number.

61038381 is a deficient number, since it is larger than the sum of its proper divisors (27238227).

61038381 is a wasteful number, since it uses less digits than its factorization.

61038381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29252.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 61038381 is about 7812.7063812740. The cubic root of 61038381 is about 393.7322620379.

The spelling of 61038381 in words is "sixty-one million, thirty-eight thousand, three hundred eighty-one".