61551234 has 24 divisors (see below), whose sum is σ = 133585452. Its totient is φ = 20482560.

The previous prime is 61551233. The next prime is 61551263. The reversal of 61551234 is 43215516.

61551234 is a `hidden beast` number, since 615 + 5 + 12 + 34 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56475225 + 5076009 = 7515^2 + 2253^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61551198 and 61551207.

It is not an unprimeable number, because it can be changed into a prime (61551233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9574 + ... + 14654.

Almost surely, 2^61551234 is an apocalyptic number.

61551234 is an abundant number, since it is smaller than the sum of its proper divisors (72034218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61551234 is a wasteful number, since it uses less digits than its factorization.

61551234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5762 (or 5759 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 61551234 is about 7845.4594511730. The cubic root of 61551234 is about 394.8319190879.

The spelling of 61551234 in words is "sixty-one million, five hundred fifty-one thousand, two hundred thirty-four".