251480061 has 12 divisors (see below), whose sum is σ = 415141792. Its totient is φ = 143702856.

The previous prime is 251480059. The next prime is 251480093. The reversal of 251480061 is 160084152.

It is not a de Polignac number, because 251480061 - 2¹ = 251480059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251480041) 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, 1995811 + ... + 1995936.

Almost surely, 2^251480061 is an apocalyptic number.

251480061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

251480061 is a deficient number, since it is larger than the sum of its proper divisors (163661731).

251480061 is a wasteful number, since it uses less digits than its factorization.

251480061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3991760 (or 3991757 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 251480061 is about 15858.1228712606. The cubic root of 251480061 is about 631.2012530275.

The spelling of 251480061 in words is "two hundred fifty-one million, four hundred eighty thousand, sixty-one".