55072501 has 4 divisors (see below), whose sum is σ = 60079104. Its totient is φ = 50065900.

The previous prime is 55072487. The next prime is 55072519. The reversal of 55072501 is 10527055.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55072501 - 2¹¹ = 55070453 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 (55072541) 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, 2503285 + ... + 2503306.

It is an arithmetic number, because the mean of its divisors is an integer number (15019776).

Almost surely, 2^55072501 is an apocalyptic number.

It is an amenable number.

55072501 is a deficient number, since it is larger than the sum of its proper divisors (5006603).

55072501 is a wasteful number, since it uses less digits than its factorization.

55072501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5006602.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 55072501 is about 7421.0848937335. The cubic root of 55072501 is about 380.4622744365.

Adding to 55072501 its reverse (10527055), we get a palindrome (65599556).

It can be divided in two parts, 5507 and 2501, that added together give a palindrome (8008).

The spelling of 55072501 in words is "fifty-five million, seventy-two thousand, five hundred one".