61212051 has 16 divisors (see below), whose sum is σ = 91016320. Its totient is φ = 40658760.

The previous prime is 61212049. The next prime is 61212061. The reversal of 61212051 is 15021216.

61212051 is a `hidden beast` number, since 612 + 1 + 2 + 0 + 51 = 666.

It is not a de Polignac number, because 61212051 - 2¹ = 61212049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61212061) 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, 3636 + ... + 11646.

It is an arithmetic number, because the mean of its divisors is an integer number (5688520).

Almost surely, 2^61212051 is an apocalyptic number.

61212051 is a deficient number, since it is larger than the sum of its proper divisors (29804269).

61212051 is a wasteful number, since it uses less digits than its factorization.

61212051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8303 (or 8297 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 61212051 is about 7823.8130729204. The cubic root of 61212051 is about 394.1053318491.

Adding to 61212051 its reverse (15021216), we get a palindrome (76233267).

It can be divided in two parts, 612120 and 51, that added together give a triangular number (612171 = T₁₁₀₆).

The spelling of 61212051 in words is "sixty-one million, two hundred twelve thousand, fifty-one".