61838151 has 4 divisors (see below), whose sum is σ = 82450872. Its totient is φ = 41225432.

The previous prime is 61838113. The next prime is 61838173. The reversal of 61838151 is 15183816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61838151 - 2¹⁸ = 61576007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61838111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10306356 + ... + 10306361.

It is an arithmetic number, because the mean of its divisors is an integer number (20612718).

Almost surely, 2^61838151 is an apocalyptic number.

61838151 is a deficient number, since it is larger than the sum of its proper divisors (20612721).

61838151 is a wasteful number, since it uses less digits than its factorization.

61838151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20612720.

The product of its digits is 5760, while the sum is 33.

The square root of 61838151 is about 7863.7237362461. The cubic root of 61838151 is about 395.4444625734. Note that the first 4 decimals are identical.

It can be divided in two parts, 6183815 and 1, that added together give a palindrome (6183816).

The spelling of 61838151 in words is "sixty-one million, eight hundred thirty-eight thousand, one hundred fifty-one".