61218434 has 8 divisors (see below), whose sum is σ = 92093328. Its totient is φ = 30520660.

The previous prime is 61218431. The next prime is 61218467. The reversal of 61218434 is 43481216.

61218434 = T₄₁₂ + T₄₁₃ + ... + T₇₅₈.

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

It is a super-2 number, since 2×61218434² = 7495393322824712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61218397 and 61218406.

It is not an unprimeable number, because it can be changed into a prime (61218431) 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, 43412 + ... + 44799.

It is an arithmetic number, because the mean of its divisors is an integer number (11511666).

Almost surely, 2^61218434 is an apocalyptic number.

61218434 is a deficient number, since it is larger than the sum of its proper divisors (30874894).

61218434 is a wasteful number, since it uses less digits than its factorization.

61218434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88560.

The product of its digits is 4608, while the sum is 29.

The square root of 61218434 is about 7824.2209835868. The cubic root of 61218434 is about 394.1190300608.

The spelling of 61218434 in words is "sixty-one million, two hundred eighteen thousand, four hundred thirty-four".